Solver Statistics

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Sokoban solvers are programs that solve sokoban levels. There are many programs available that can solve Sokoban levels (see [[Links#Sokoban Solvers |Sokoban solvers]]).
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A Sokoban solver program is a program that <u>''tries to''</u> solve Sokoban levels. There are several solver programs available. (See [[Links#Sokoban Solvers |Sokoban solvers]].)
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There are different solver types:
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Solver programs may have different objectives:
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# Solvers which just try to find any solution
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# Find any solution
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# Solvers which try to find push optimal solutions
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# Find push optimal solutions
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# Solvers which try to find push optimal solutions with best moves
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# Find push optimal solutions with best moves
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# Solvers which try to find move optimal solutions
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# Find move optimal solutions
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# Solvers which try to find move optimal solutions with best pushes
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# Find move optimal solutions with best pushes
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Usually a solver is designed to just find any solution. If the solution is to be optimized an optimizer program can be used ([[Links#Sokoban Solvers |Optimizers]]).
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Given the computational complexity of these tasks, a solver program is usually designed for just finding any solution. If a solution is to be optimized, an optimizer program can be used. (See [[Links#Sokoban Solvers |Optimizers]].)
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To get an impression of what levels are solvable by which solver here are some statistics.<br />  
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The statistics presented here provide a picture of what the best freely available Sokoban solvers can do.<br />  
For copyrights, credits and redistribution of these statistics, please read the disclaimer.
For copyrights, credits and redistribution of these statistics, please read the disclaimer.
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== Statistics for Various Level Sets ==
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== General benchmarking information ==
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{| class="soko-table"
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|-
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! colspan="8" | Solver Statistics - Solved Levels
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<!-- Header -->
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For practical reasons, almost all tests have been performed with a 10 minutes time limit. The tests are, however, not a 10 minutes contest but a showcase for what the solvers can do, so other time limits are entirely feasible.
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|- bgcolor="#f1efe5" align="center"
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| width="115" align="left" |                                                          Collection
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| width="160"              |                                                          Author
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| width=" 70"              |                                                          Levels
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| width=" 80"              |                                                          BoxSearch
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| width= "80"              | [http://www.ic-net.or.jp/home/takaken/e/soko/index.html  Takaken]
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| width=" 80"              | [https://sourceforge.net/projects/sokobanyasc/            YASS]
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| width=" 80"              | [[JSoko Solver                                          | JSoko]]
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| width=" 80"              | [http://codeanalysis.fr/sokoban/                          Sokolution ]
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<!-- -------------------------------------------------------------------------------------------- -->
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The hardware used for the tests is a standard PC with a modern operating system (64bit).
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<!-- Aymeric du Peloux. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution" -->
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<!-- -------------------------------------------------------------------------------------------- -->
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|- align="right"
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| align="left" bgcolor="#f1efe5"          | Aymeric
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| align="left"                            | Aymeric du Peloux
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|                                              282
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|                                            '''282'''
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| [[SolverStatistics-takaken-Aymeric      | '''282''' ]]
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| [[SolverStatistics-yass-Aymeric          | '''282''' ]]
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| [[SolverStatistics-jsoko-AymericduPeloux | '''282''' ]]
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| [[SolverStatistics-sokolution-Aymeric    | '''282''' ]]
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<!-- -------------------------------------------------------------------------------------------- -->
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Tests are performed with default solver settings.
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<!-- BoxWorld. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution"          -->
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<!-- -------------------------------------------------------------------------------------------- -->
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|- align="right"
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| align="left" bgcolor="#f1efe5"                  | [[Solver Statistics - BoxWorld - Various Authors| BoxWorld]]
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| align="left"                                    | Various Authors
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|                                                      100
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|                                                      87
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| [[SolverStatistics-takaken-BoxWorld              | '''98''' ]]
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| [[SolverStatistics-yass-BoxWorld                |    94    ]]
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| [[SolverStatistics-jsoko-VariousAuthors-BoxWorld |    82    ]]
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| [[SolverStatistics-sokolutionv2.02-BoxWorld          |    96    ]]
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<!-- -------------------------------------------------------------------------------------------- -->
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{| class="soko-table feature-list"
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<!-- Grigr2001. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution"         -->
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!Solver                                                                    || Version || Author                        || Architecture || CPU usage || Source code available || More info
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<!-- -------------------------------------------------------------------------------------------- -->
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|-
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|- align="right"
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|<span class="plainlinks">[https://festival-solver.site/ Festival]</span>                                  || 3.1    || Yaron Shoham ||  64bit        || 8 threads    || <span class="plainlinks">[https://festival-solver.site/ Festival 3.1]</span>               || <span class="plainlinks">[https://festival-solver.site/ Website with papers about the solver]</span>  
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| align="left" bgcolor="#f1efe5"                     | [[Solver Statistics - Grigr2001 - Evgeny Grigoriev| Grigr2001]]
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|-
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| align="left"                                       | Evgeny Grigoriev
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|<span class="plainlinks">[https://sokolution.000webhostapp.com/ Sokolution]</span>                        || 6.33 || Florent Diedler                || 64bit        || all threads || no                  || <span class="plainlinks">[[Sokoban solver "scribbles" by Florent Diedler about the Sokolution solver | Sokoban solver "scribbles" by Florent Diedler]]</span>
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|                                                       100
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|-
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|                                                         93
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|<span class="plainlinks">[https://computerpuzzle.net/english/sokoban/ver740/index.html Takaken]</span>    || 7.4    || Ken'ichiro Takahashi (takaken) || 64bit        || 2 threads || no                  || <span class="plainlinks">[https://computerpuzzle.net/puzzle/sokoban/ver731/index.html Description of the used algorithms]</span>
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| [[SolverStatistics-takaken-Grigr2001              |   94    ]]
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|-
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| [[SolverStatistics-yass-Grigr2001                  |   93    ]]
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|<span class="plainlinks">[https://festival-solver.site/curry/ Curry]</span>                                || 0.3    || Yaron Shoham                  || 64bit        || 1 thread  || <span class="plainlinks">[https://festival-solver.site/curry/ Curry 0.3] || <span class="plainlinks">[https://festival-solver.site/curry/ Website with paper about the solver]</span>
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| [[SolverStatistics-jsoko-EvgenyGrigoriev-Grigr2001 |   91    ]]
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|-
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| [[SolverStatistics-sokolution-Grigr2001            | '''96''' ]]
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|<span class="plainlinks">[https://sourceforge.net/projects/sokobanyasc/files/sokobanyasc/ YASS]</span>    || 2.151  || Brian Damgaard                || 32bit        || 1 thread  || <span class="plainlinks">[https://sourceforge.net/projects/sokobanyasc/files/sokobanyasc/ YASS 2.151]</span>  || <span class="plainlinks">[[Sokoban solver "scribbles" by Brian Damgaard about the YASS solver | Sokoban solver "scribbles" by Brian Damgaard]]</span>
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|-
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|<span class="plainlinks">[https://www.sokoban-online.de/ JSoko]</span>                                    || 2.04    || Matthias Meger                || 64bit        || 1 thread  || <span class="plainlinks">[https://sourceforge.net/projects/jsokoapplet/files/JSoko/Version%202.03/ JSoko 2.04]</span>  || [[Solver | Solver information]]
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|-
 +
|<span class="plainlinks">[https://webdocs.cs.ualberta.ca/~games/Sokoban/program.html Rolling Stone]</span> || 1.0    || Andreas Junghanns              || 32bit        || 1 thread  || <span class="plainlinks">[https://webdocs.cs.ualberta.ca/~games/Sokoban/Src/ RS] || <span class="plainlinks">[https://scholar.google.com/scholar?hl=de&as_sdt=0%2C5&q=rolling+stone+sokoban&btnG= Rolling Stone papers]</span>
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|}
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<!-- -------------------------------------------------------------------------------------------- -->
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Contact: SokobanoWiki@gmail.com
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<!-- Grigr2002. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution"        -->
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<!-- -------------------------------------------------------------------------------------------- -->
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|- align="right"
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| align="left" bgcolor="#f1efe5"                    | [[Solver Statistics - Grigr2002 - Evgeny Grigoriev| Grigr2002]]
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| align="left"                                      | Evgeny Grigoriev
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|                                                        40
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|                                                        37
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| [[SolverStatistics-takaken-Grigr2002              |    37    ]]
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| [[SolverStatistics-yass-Grigr2002                  |    38    ]]
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| [[SolverStatistics-jsoko-EvgenyGrigoriev-Grigr2002 |    34    ]]
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| [[SolverStatistics-sokolution-Grigr2002            | '''39''' ]]
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<!-- -------------------------------------------------------------------------------------------- -->
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== XSokoban Test Suite ==
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<!-- GrigrSpecial. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution"      -->
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<!-- -------------------------------------------------------------------------------------------- -->
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|- align="right"
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| align="left" bgcolor="#f1efe5"                        | [[Solver Statistics - GrigrSpecial - Evgeny Grigoriev| GrigrSpecial]]
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| align="left"                                          | Evgeny Grigoriev
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-
|                                                            40
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|                                                            39
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| [[SolverStatistics-takaken-GrigrSpecial              | '''40''' ]]
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| [[SolverStatistics-yass-GrigrSpecial                  | '''40''' ]]
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| [[SolverStatistics-jsoko-EvgenyGrigoriev-GrigrSpecial |    39    ]]
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| [[SolverStatistics-sokolution-GrigrSpecial            | '''40''' ]]
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<!-- -------------------------------------------------------------------------------------------- -->
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The XSokoban level set is the de facto standard test suite in the academic literature on Sokoban solver programming.
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<!-- Holland. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution"          -->
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<!-- -------------------------------------------------------------------------------------------- -->
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|- align="right"
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| align="left" bgcolor="#f1efe5"          | [[Solver Statistics - David Holland| Holland]]
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| align="left"                            | David Holland
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|                                              81
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|                                              56
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| [[SolverStatistics-takaken-Holland      | '''65''' ]]
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| [[SolverStatistics-yass-Holland          |    59    ]]
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| [[SolverStatistics-David Holland-Holland |    55    ]]
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| [[SolverStatistics-sokolution-Holland    |    64    ]]
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<!-- -------------------------------------------------------------------------------------------- -->
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{| class="soko-table"
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<!-- Kenyam Set A. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution"      -->
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|-
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<!-- -------------------------------------------------------------------------------------------- -->
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! colspan="11" | Sokoban Solver Statistics - XSokoban Test Suite - Solved Levels
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|- align="right"
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| align="left" bgcolor="#f1efe5"                    | [[Solver Statistics - Kenya Maruyama| Kenyam Set A]]
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| align="left"                                      | Kenya Maruyama
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|                                                        52
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|                                                        48
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| [[SolverStatistics-takaken-KenyamSetA            |    50    ]]
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| [[SolverStatistics-yass-KenyamSetA                |    51    ]]
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| [[SolverStatistics-jsoko-KenyaMaruyama-KenyamSetA |    45    ]]
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| [[SolverStatistics-sokolution-KenyamSetA          | '''52''' ]]
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<!-- -------------------------------------------------------------------------------------------- -->
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<!-- Header -->
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<!-- Microban. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution"         -->
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|- bgcolor="#f1efe5" align="center"
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<!-- -------------------------------------------------------------------------------------------- -->
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| width="115" align="left" |      Collection
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|- align="right"
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| width="160"   |                Author
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| align="left" bgcolor="#f1efe5"                 | [[Solver Statistics - Microban - David W. Skinner| Microban]]
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| width=" 70"  |                Levels
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| align="left"                                   | David W. Skinner
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| width= "90"  | <span class="plainlinks">[https://www.researchgate.net/publication/2305703_Pushing_the_Limits_New_Developments_in_Single-Agent_Search Rolling Stone]</span>
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|                                                     155
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| width= "80"   | <span class="plainlinks">[https://computerpuzzle.net/english/sokoban/ver740/index.html                Takaken]</span>
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|                                                   '''155'''
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| width=" 80"  | <span class="plainlinks">[https://sourceforge.net/projects/sokobanyasc/ YASS]</span>
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| [[SolverStatistics-takaken-Microban            | '''155''' ]]
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| width=" 80"  | [[JSoko Solver    | JSoko]]
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| [[SolverStatistics-yass-Microban                | '''155''' ]]
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| width=" 80"  | <span class="plainlinks">[https://sokolution.000webhostapp.com/ Sokolution ]</span>
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| [[SolverStatistics-jsoko-DavidWSkinner-Microban | '''155''' ]]
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| width=" 80"  | <span class="plainlinks">[https://festival-solver.site/curry/ Curry ]</span>
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| [[SolverStatistics-sokolution-Microban          | '''155''' ]]
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| width=" 80"  | <span class="plainlinks">[https://festival-solver.site/ Festival ]</span>
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<!-- -------------------------------------------------------------------------------------------- -->
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<!-- -------------------------------------------------------------------------------------------------------- -->
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<!-- Microban II. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution"       -->
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<!-- XSokoban. "Collection, author, levels, Rolling Stone, Takaken, YASS, JSoko, Sokolution, Festival" -->
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<!-- -------------------------------------------------------------------------------------------- -->
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<!-- -------------------------------------------------------------------------------------------------------- -->
|- align="right"
|- align="right"
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| align="left" bgcolor="#f1efe5"                     | [[Solver Statistics - Microban II - David W. Skinner| Microban II]]
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| align="left" bgcolor="#f1efe5" | <span class="plainlinks">[https://sokoban-solver-statistics.sourceforge.io/statistics/XSokoban/ XSokoban]</span>
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| align="left"                                       | David W. Skinner
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| align="left"                                               | Thinking Rabbit, ...
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|                                                         135
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|                                                                 90
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|                                                         134
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| <span class="plainlinks">[https://webdocs.cs.ualberta.ca/~games/Sokoban/program.html 59*]</span>
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| [[SolverStatistics-takaken-Microban-II            |    134   ]]
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| <span class="plainlinks">[https://sokoban-solver-statistics.sourceforge.io/statistics/XSokoban/Takaken%20-%20XSokoban.html '''90''']</span>
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| [[SolverStatistics-yass-Microban-II                | '''135''' ]]
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| <span class="plainlinks">[https://sokoban-solver-statistics.sourceforge.io/statistics/XSokoban/YASS%20-%20XSokoban.html 89]</span>
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| [[SolverStatistics-jsoko-DavidWSkinner-MasMicroban | '''135''' ]]
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| [[SolverStatistics-jsoko-ThinkingRabbit-XSokoban            |    67   ]]
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| [[SolverStatistics-sokolution-Microban-II          |    132    ]]
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| <span class="plainlinks">[https://sokoban-solver-statistics.sourceforge.io/statistics/XSokoban/Sokolution%20-%20XSokoban.html '''90''']</span>
 +
| <span class="plainlinks">[https://sokoban-solver-statistics.sourceforge.io/statistics/XSokoban/Curry%20-%20XSokoban.html '''90''']</span>
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| <span class="plainlinks">[https://sokoban-solver-statistics.sourceforge.io/statistics/XSokoban/Festival%20-%20XSokoban.html '''90''']</span>
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<!-- -------------------------------------------------------------------------------------------- -->
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|}
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<!-- Sasquatch. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution"        -->
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<!-- -------------------------------------------------------------------------------------------- -->
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|- align="right"
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| align="left" bgcolor="#f1efe5"                  | [[Solver Statistics - Sasquatch - David W. Skinner| Sasquatch]]
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| align="left"                                    | David W. Skinner
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|                                                      50
+
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|                                                      22
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| [[SolverStatistics-takaken-Sasquatch            | '''36''' ]]
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| [[SolverStatistics-yass-Sasquatch                |    26    ]]
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| [[SolverStatistics-jsoko-DavidWSkinner-Sasquatch |    28    ]]
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| [[SolverStatistics-sokolution-Sasquatch          |    34 ]]
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<!-- -------------------------------------------------------------------------------------------- -->
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*) 59 solved puzzles according to paper [https://sokoban.dk/wp-content/uploads/2016/02/Single-Agent.pdf Sokoban Enhancing general single-agent search methods using domain knowledge]
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<!-- Sasquatch II. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution"      -->
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<!-- -------------------------------------------------------------------------------------------- -->
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|- align="right"
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| align="left" bgcolor="#f1efe5"                      | [[Solver Statistics - Sasquatch II - David W. Skinner| Sasquatch II]]
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| align="left"                                        | David W. Skinner
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|                                                          50
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|                                                          16
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| [[SolverStatistics-takaken-Sasquatch-II            | '''33''' ]]
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| [[SolverStatistics-yass-Sasquatch-II                |    20    ]]
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| [[SolverStatistics-jsoko-DavidWSkinner-MasSasquatch |    18    ]]
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| [[SolverStatistics-sokolution-Sasquatch-II          |    29    ]]
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<!-- -------------------------------------------------------------------------------------------- -->
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{| class="soko-table"
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<!-- Sasquatch III. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution"    -->
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|-
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<!-- -------------------------------------------------------------------------------------------- -->
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|- align="right"
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| align="left" bgcolor="#f1efe5"                      | [[Solver Statistics - Sasquatch III - David W. Skinner| Sasquatch III]]
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| align="left"                                        | David W. Skinner
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|                                                         50
+
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|                                                          14
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| [[SolverStatistics-takaken-Sasquatch-III            |    22    ]]
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| [[SolverStatistics-yass-Sasquatch-III              |    13    ]]
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| [[SolverStatistics-jsoko-DavidWSkinner-SasquatchIII |    12    ]]
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| [[SolverStatistics-sokolution-Sasquatch-III        | '''24''' ]]
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<!-- -------------------------------------------------------------------------------------------- -->
<!-- -------------------------------------------------------------------------------------------- -->
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<!-- Sasquatch IV. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution"     -->
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! colspan="7" | Sokoban Solver Statistics - XSokoban Test Suite - Push-optimal Solutions
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<!-- -------------------------------------------------------------------------------------------- -->
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|- bgcolor="#f1efe5" align="center"
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|- align="right"
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| width="115" align="left" | Collection
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| align="left" bgcolor="#f1efe5"                     | [[Solver Statistics - Sasquatch IV - David W. Skinner| Sasquatch IV]]
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| width="160"             | Author
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| align="left"                                       | David W. Skinner
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| width=" 70"             | Levels
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|                                                         50
+
| width=" 80"              | <span class="plainlinks">[https://www.researchgate.net/publication/2305703_Pushing_the_Limits_New_Developments_in_Single-Agent_Search Rolling Stone]</span>
-
|                                                        27
+
| width=" 80"              | <span class="plainlinks">[http://www.ijcai.org/Abstract/16/100 Pereira et al.]</span>
-
| [[SolverStatistics-takaken-Sasquatch-IV            | '''37''' ]]
+
| width=" 80"              | <span class="plainlinks">[http://sourceforge.net/projects/jsokoapplet/ JSoko]</span>
-
| [[SolverStatistics-yass-Sasquatch-IV              |    30    ]]
+
| width=" 80"              | <span class="plainlinks">[https://sokolution.000webhostapp.com/ Sokolution ]</span>
-
| [[SolverStatistics-jsoko-DavidWSkinner-SasquatchIV |    25    ]]
+
-
| [[SolverStatistics-sokolution-Sasquatch-IV        |    34    ]]
+
-
<!-- -------------------------------------------------------------------------------------------- -->
 
-
<!-- Sasquatch V. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution"      -->
 
<!-- -------------------------------------------------------------------------------------------- -->
<!-- -------------------------------------------------------------------------------------------- -->
|- align="right"
|- align="right"
-
| align="left" bgcolor="#f1efe5"                   | [[Solver Statistics - Sasquatch V - David W. Skinner| Sasquatch V]]
+
| align="left" bgcolor="#f1efe5" | XSokoban
-
| align="left"                                     | David W. Skinner
+
| align="left"                   | Thinking Rabbit, ...
-
|                                                       50
+
|               90
-
|                                                       30
+
|               <span class="plainlinks">[https://webdocs.cs.ualberta.ca/~games/Sokoban/program.html 6 ]</span>
-
| [[SolverStatistics-takaken-Sasquatch-V            |    36    ]]
+
|               [[SolverStatistics-Pereira-ThinkingRabbit-XSokoban-Push-Optimal | 28 ]]
-
| [[SolverStatistics-yass-Sasquatch-V              |   29    ]]
+
|               <span class="plainlinks">[https://www.sokoban-online.de/jsoko/solver-statistics/ 31 ]</span>
-
| [[SolverStatistics-jsoko-DavidWSkinner-SasquatchV |    25    ]]
+
|               [[SolverStatistics-Sokolutionv4.0-ThinkingRabbit-XSokoban-Push-Optimal | '''59''' ]]
-
| [[SolverStatistics-sokolution-Sasquatch-V        | '''37''' ]]
+
-
<!-- -------------------------------------------------------------------------------------------- -->
+
|}
-
<!-- Sasquatch VI. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution"      -->
+
-
<!-- -------------------------------------------------------------------------------------------- -->
+
-
|- align="right"
+
-
| align="left" bgcolor="#f1efe5"                    | [[Solver Statistics - Sasquatch VI - David W. Skinner| Sasquatch VI]]
+
-
| align="left"                                      | David W. Skinner
+
-
|                                                        50
+
-
|                                                        30
+
-
| [[SolverStatistics-takaken-Sasquatch-VI            |    32    ]]
+
-
| [[SolverStatistics-yass-Sasquatch-VI              |    25    ]]
+
-
| [[SolverStatistics-jsoko-DavidWSkinner-SasquatchVI |    26    ]]
+
-
| [[SolverStatistics-sokolution-Sasquatch-VI        | '''36''' ]]
+
-
<!-- -------------------------------------------------------------------------------------------- -->
+
The statistic shows that Sokolution is by far the best solver when searching for push optimal solutions.
-
<!-- Sasquatch VII. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution"    -->
+
-
<!-- -------------------------------------------------------------------------------------------- -->
+
-
|- align="right"
+
-
| align="left" bgcolor="#f1efe5"                      | [[Solver Statistics - Sasquatch VII - David W. Skinner| Sasquatch VII]]
+
-
| align="left"                                        | David W. Skinner
+
-
|                                                          50
+
-
|                                                          30
+
-
| [[SolverStatistics-takaken-Sasquatch-VII            |    31    ]]
+
-
| [[SolverStatistics-yass-Sasquatch-VII              |    26    ]]
+
-
| [[SolverStatistics-jsoko-DavidWSkinner-SasquatchVII |    25    ]]
+
-
| [[SolverStatistics-sokolution-Sasquatch-VII        | '''39''' ]]
+
-
<!-- -------------------------------------------------------------------------------------------- -->
+
== Large Test Suite ==
-
<!-- SokEvo. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution"            -->
+
-
<!-- -------------------------------------------------------------------------------------------- -->
+
-
|- align="right"
+
-
| align="left" bgcolor="#f1efe5"      | SokEvo
+
-
| align="left"                        | Lee J Haywood
+
-
|                                          107
+
-
|                                        '''107'''
+
-
| [[SolverStatistics-takaken-SokEvo    | '''107''' ]]
+
-
| [[SolverStatistics-yass-SokEvo      | '''107''' ]]
+
-
|                                        '''107'''
+
-
| [[SolverStatistics-sokolution-SokEvo | '''107''' ]]
+
-
<!-- -------------------------------------------------------------------------------------------- -->
+
The large test suite comprises level packs selected for being a challenge for the solvers, but not too difficult. The statistics shows the results for the leading Sokoban solver programs.  
-
<!-- SokHard. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution"          -->
+
-
<!-- -------------------------------------------------------------------------------------------- -->
+
-
|- align="right"
+
-
| align="left" bgcolor="#f1efe5"              | [[Solver Statistics - Lee J Haywood | SokHard ]]
+
-
| align="left"                                | Lee J Haywood
+
-
|                                                  163
+
-
|                                                '''163'''
+
-
| [[SolverStatistics-takaken-SokHard          | '''163''' ]]
+
-
| [[SolverStatistics-yass-SokHard              | '''163''' ]]
+
-
| [[SolverStatistics-jsoko-LeeJHaywood-SokHard |    158    ]]
+
-
| [[SolverStatistics-sokolution-SokHard        | '''163''' ]]
+
-
<!-- -------------------------------------------------------------------------------------------- -->
+
This test suite is not subject to change, as it is intended to be a "Large Standard Test Suite" for Sokoban solver programs.  
-
<!-- Sven. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution"              -->
+
-
<!-- -------------------------------------------------------------------------------------------- -->
+
-
|- align="right"
+
-
| align="left" bgcolor="#f1efe5"          | [[Solver Statistics - Sven Egevad | Sven ]]
+
-
| align="left"                             | Sven Egevad
+
-
|                                              1623
+
-
|                                              1170
+
-
| [[SolverStatistics-takaken-SvenEgevad    |    1384  ]]
+
-
| [[SolverStatistics-yass-SvenEgevad      |    1251  ]]
+
-
| [[SolverStatistics-jsoko-SvenEgevad-Sven |    1147  ]]
+
-
| [[SolverStatistics-sokolutionv2.02-SvenEgevad | '''1405''']]
+
-
<!-- -------------------------------------------------------------------------------------------- -->
+
{| class="soko-table"
-
<!-- XSokoban. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution"          -->
+
|-
-
<!-- -------------------------------------------------------------------------------------------- -->
+
! colspan="6" | Sokoban Solver Statistics - Large Test Suite - Solved levels
-
|- align="right"
+
-
| align="left" bgcolor="#f1efe5"                      | [[Solver Statistics - XSokoban - Thinking Rabbit & Various Authors| XSokoban ]]
+
-
| align="left"                                        | Thinking Rabbit, ...
+
-
|                                                          90
+
-
|                                                          42
+
-
| [[SolverStatistics-takaken-ThinkingRabbit-XSokoban  | '''86''' ]]
+
-
| [[SolverStatistics-yass-ThinkingRabbit-XSokoban    |    84    ]]
+
-
| [[SolverStatistics-jsoko-ThinkingRabbit-XSokoban    |    71    ]]
+
-
| [[SolverStatistics-fsoko-ThinkingRabbit-XSokoban    |    76    ]]
+
-
<!-- -------------------------------------------------------------------------------------------- -->
+
<!-- Header -->
-
<!-- Y.M. Auto. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution"         -->
+
|- bgcolor="#f1efe5" align="center"
-
<!-- -------------------------------------------------------------------------------------------- -->
+
| width="115" align="left" |  
-
|- align="right"
+
| width=" 70"   | Levels
-
| align="left" bgcolor="#f1efe5"                         | Y.M. Auto
+
| width= "80"  | <span class="plainlinks">[https://festival-solver.site/ Festival ]</span>
-
| align="left"                                           | Yoshio Murase
+
| width=" 80"  | <span class="plainlinks">[https://sokolution.000webhostapp.com/ Sokolution]</span>
-
|                                                             52
+
| width=" 80"  | <span class="plainlinks">[https://computerpuzzle.net/english/sokoban/ver740/index.html Takaken]</span>
-
|                                                          '''52'''
+
| width=" 80"  | <span class="plainlinks">[https://sourceforge.net/projects/sokobanyasc/ YASS]</span>
-
| [[SolverStatistics-takaken-YoshioMuraseAutogenerated    | '''52''' ]]
+
-
| [[SolverStatistics-yass-YoshioMuraseAutogenerated      | '''52''' ]]
+
-
|                                                           '''52'''
+
-
| [[SolverStatistics-sokolution-YoshioMuraseAutogenerated | '''52''' ]]
+
-
<!-- -------------------------------------------------------------------------------------------- -->
 
-
<!-- Y.M. Handmade. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution"    -->
 
-
<!-- -------------------------------------------------------------------------------------------- -->
 
-
|- align="right"
 
-
| align="left" bgcolor="#f1efe5"                    | [[Solver Statistics - Y.M. Handmade - Yoshio Murase| Y.M. Handmade ]]
 
-
| align="left"                                      | Yoshio Murase
 
-
|                                                        54
 
-
|                                                      '''54'''
 
-
| [[SolverStatistics-takaken-YoshioMuraseHandmade    | '''54''' ]]
 
-
| [[SolverStatistics-yass-YoshioMuraseHandmade      |    52    ]]
 
-
| [[SolverStatistics-jsoko-YoshioMurase-Handmade    |    52    ]]
 
-
| [[SolverStatistics-sokolution-YoshioMuraseHandmade |    53    ]]
 
-
 
-
<!-- -------------------------------------------------------------------------------------------------------- -->
 
-
<!-- Total solved levels by solver. "Collection, author, levels, BoxSearch, Takaken, YASS, JSoko, Sokolution" -->
 
-
<!-- -------------------------------------------------------------------------------------------------------- -->
 
|- bgcolor="#f1efe5" align="right"
|- bgcolor="#f1efe5" align="right"
-
| align="left" | Total
+
| align="left" | Total levels
-
|
+
|    3272     <!-- Total levels -->
-
|    3424     <!-- Total levels -->
+
| '''3205'''  <!-- Festival    -->
-
|   2688      <!-- BoxSearch    -->
+
|    3172     <!-- Sokolution  -->
-
|    3028     <!-- Takaken      -->
+
|    2953     <!-- Takaken      -->
-
|    2825     <!-- YASS        -->
+
|    2891     <!-- YASS        -->
-
|    2664     <!-- JSoko        -->
+
-
| '''3041'''  <!-- Sokolution  -->
+
|}
|}
-
== Statistics for Push-Optimal Solvers ==
+
'''[https://sokoban-solver-statistics.sourceforge.io/statistics/LargeTestSuite/ Click here to see the detailed results for the Large Test Suite].'''
 +
 
 +
Download the entire test suite [https://sourceforge.net/projects/sokoban-solver-statistics/files/Large%20Test%20Suite.zip/download here] or the individual level sets from [http://sokobano.de/de/levels.php www.sokobano.de].
 +
 
 +
== Open Test Suite ==
 +
 
 +
The statistics shows the results for the leading Sokoban solvers for various level collections. Please note that the grand totals are simple summations. The number of solved unique levels may differ slightly due to duplicate levels in the level packs.
 +
 
 +
This test suite may be changed by adding new level collections from time to time.
{| class="soko-table"
{| class="soko-table"
|-
|-
 +
! colspan="6" | Sokoban Solver Statistics - Open Test Suite - Solved levels
-
<!-- -------------------------------------------------------------------------------------------- -->
+
<!-- Header -->
-
! colspan="5" | Solver Statistics - Push-optimal Solutions
+
|- bgcolor="#f1efe5" align="center"
|- bgcolor="#f1efe5" align="center"
-
| width="115" align="left" | Collection
+
| width="115" align="left" |  
-
| width="160"             | Author
+
| width=" 70"   | Levels
-
| width=" 70"             | Levels
+
| width= "80"   | <span class="plainlinks">[https://festival-solver.site/ Festival]</span>
-
| width=" 80"             | [http://www.ijcai.org/Abstract/16/100 Pereira et al.]
+
| width=" 80"   | <span class="plainlinks">[https://sokolution.000webhostapp.com/ Sokolution]</span>
-
| width=" 80"             | [http://sourceforge.net/projects/jsokoapplet/ JSoko]  
+
| width=" 80"  | <span class="plainlinks">[https://computerpuzzle.net/english/sokoban/ver740/index.html Takaken]</span>
 +
| width=" 80"   | <span class="plainlinks">[https://sourceforge.net/projects/sokobanyasc/ YASS]</span>
-
<!-- -------------------------------------------------------------------------------------------- -->
 
-
|- align="right"
 
-
| align="left" bgcolor="#f1efe5" | XSokoban
 
-
| align="left"                  | Thinking Rabbit, ...
 
-
|                                  90
 
-
|                                  [[SolverStatistics-Pereira-ThinkingRabbit-XSokoban-Push-Optimal | 28 ]]
 
-
|                                  [https://www.sokoban-online.de/jsoko/solver-statistics/ '''31''' ]
 
-
 
-
<!-- -------------------------------------------------------------------------------------------- -->
 
|- bgcolor="#f1efe5" align="right"
|- bgcolor="#f1efe5" align="right"
-
| align="left" | Total
+
| align="left" | Total levels
-
|
+
|    4762      <!-- Total levels -->
-
|    90
+
| '''4634'''   <!-- Festival    -->
-
|    28
+
|    4568      <!-- Sokolution  -->
-
| '''31'''
+
|    4207      <!-- Takaken      -->
 +
|    4028      <!-- YASS        -->
|}
|}
 +
 +
'''[https://sokoban-solver-statistics.sourceforge.io/statistics/OpenTestSuite/ Click here to see the detailed results for the Open Test Suite].'''
 +
 +
'''[https://sokoban-solver-statistics.sourceforge.io/statistics/Sokolution/ Click here to see the detailed results for the Open Test Suite only for the various Sokolution versions].'''
== GroupEffort Test Suite ==
== GroupEffort Test Suite ==
-
The reason for benchmarking the GroupEffort test suite is to show the limited veracity of the statement made in section "6 Conclusion" of the thesis, where the author writes that the GroupEffort solver "outperforms existing solvers".  
+
The only reason for benchmarking the GroupEffort test suite is to demonstrate the limited veracity of the statement made in section "6 Conclusion" of the thesis, where the author writes that the GroupEffort solver "outperforms existing solvers".  
The benchmarks show that this was only true for the cherry-picked small test set at the time the thesis was published, never for the presumably more representative large test set.  
The benchmarks show that this was only true for the cherry-picked small test set at the time the thesis was published, never for the presumably more representative large test set.  
Line 371: Line 184:
{| class="soko-table"
{| class="soko-table"
|-
|-
-
! colspan="7" | Solver Statistics - GroupEffort Test Suite
+
! colspan="8" | Sokoban Solver Statistics - GroupEffort Test Suite - Solved Levels
<!-- -------------------------------------------------------------------------------------------- -->
<!-- -------------------------------------------------------------------------------------------- -->
Line 379: Line 192:
| width = "115" align="left" | Collection
| width = "115" align="left" | Collection
| width =  "80" |                                                        Levels
| width =  "80" |                                                        Levels
-
| width =  "80" | [https://baldur.iti.kit.edu/theses/SokobanPortfolio.pdf GroupEffort]
+
| width =  "80" | <span class="plainlinks">[https://baldur.iti.kit.edu/theses/SokobanPortfolio.pdf GroupEffort]</span>
-
| width =  "80" | [http://codeanalysis.fr/sokoban/                       Sokolution]  
+
| width =  "80" | <span class="plainlinks">[https://festival-solver.site/                         Festival]</span>
-
| width =  "80" | [http://www.ic-net.or.jp/home/takaken/e/soko/index.html Takaken]  
+
| width =  "80" | <span class="plainlinks">[https://sokolution.000webhostapp.com/                  Sokolution]</span>
-
| width =  "80" | [https://sourceforge.net/projects/jsokoapplet/          JSoko]
+
| width =  "80" | <span class="plainlinks">[http://www.ic-net.or.jp/home/takaken/e/soko/index.html Takaken]</span>
-
| width =  "80" | [https://sourceforge.net/projects/sokobanyasc/          YASS]
+
| width =  "80" | <span class="plainlinks">[https://sourceforge.net/projects/jsokoapplet/          JSoko]</span>
 +
| width =  "80" | <span class="plainlinks">[https://sourceforge.net/projects/sokobanyasc/          YASS]</span>
<!-- -------------------------------------------------------------------------------------------- -->
<!-- -------------------------------------------------------------------------------------------- -->
Line 392: Line 206:
| 200
| 200
| 196 (a)(c)  
| 196 (a)(c)  
 +
| [[SolverStatistics-Festival-GroupEffort-Small-Set  | '''200''' (b) ]]
| [[SolverStatistics-Sokolution-GroupEffort-Small-Set | '''200''' (a) ]]
| [[SolverStatistics-Sokolution-GroupEffort-Small-Set | '''200''' (a) ]]
| [[SolverStatistics-Takaken-GroupEffort-Small-Set    |    192 (b)    ]]  
| [[SolverStatistics-Takaken-GroupEffort-Small-Set    |    192 (b)    ]]  
Line 404: Line 219:
| 2851
| 2851
| 1566 (a)(c)
| 1566 (a)(c)
-
| [[SolverStatistics-Sokolution-GroupEffort-Large-Set | '''2471''' (a) ]]
+
| [[SolverStatistics-Festival-GroupEffort-Large-Set   | '''2766''' (b) ]]
 +
| [[SolverStatistics-Sokolution-GroupEffort-Large-Set |    2471 (a)   ]]
| [[SolverStatistics-Takaken-GroupEffort-Large-Set    |    2462 (b)    ]]
| [[SolverStatistics-Takaken-GroupEffort-Large-Set    |    2462 (b)    ]]
| [[SolverStatistics-JSoko-GroupEffort-Large-Set      |    2165 (b)    ]]  
| [[SolverStatistics-JSoko-GroupEffort-Large-Set      |    2165 (b)    ]]  
Line 416: Line 232:
|    3051      <!-- Total levels -->
|    3051      <!-- Total levels -->
|    1762      <!-- Group Effort -->
|    1762      <!-- Group Effort -->
-
| '''2671'''  <!-- Sokolution  -->
+
| '''2966'''  <!-- Festival    -->
 +
|    2671      <!-- Sokolution  -->
|    2654      <!-- Takaken      -->
|    2654      <!-- Takaken      -->
|    2345      <!-- JSoko        -->
|    2345      <!-- JSoko        -->
|    2471      <!-- YASS        -->  
|    2471      <!-- YASS        -->  
-
 
|}
|}
Line 444: Line 260:
   and/or other materials provided with the distribution.
   and/or other materials provided with the distribution.
  <br>
  <br>
-
  Credits (in no particular order)
+
  Credits (in no particular order)
-
  =================================
+
  ================================
-
<br>
+
-
Sokolution
+
-
Copyright (C) 2016 by Florent DIEDLER
+
-
E-mail: fdiedler2000@gmail.com
+
-
Web site: http://codeanalysis.fr/sokoban/ 
+
-
<br>
+
-
BoxSearch
+
-
Copyright (C) 2007 by Ge Yong
+
-
E-mail: notabdc@hotmail.com
+
-
Web site: unknown 
+
-
<br>
+
-
JSoko
+
-
Copyright (C) by Matthias Meger
+
-
E-mail: JSoko@online.de
+
-
Web site: http://www.sokoban-online.de
+
-
<br>
+
-
Sokoban Automatic Solver (aka Takaken solver)
+
-
Copyright (C) 2002 - 200X Ken'ichiro Takahashi (aka takaken)
+
-
E-mail: takaken@ic-net.or.jp
+
-
Web site: http://www.ic-net.or.jp/home/takaken/e/soko/index.html
+
-
<br>
+
-
YASS - Yet Another Sokoban Solver and Optimizer - For Small Levels
+
-
Copyright (C) 2007 by Brian Damgaard
+
-
E-mail: BrianDamgaard@jubii.dk
+
-
Web site: http://sourceforge.net/projects/sokobanyasc/
+
  <br>
  <br>
  CosmoNotes, CosmoPoly, LOMA, MicroCosmos, MiniCosmos,
  CosmoNotes, CosmoPoly, LOMA, MicroCosmos, MiniCosmos,
Line 493: Line 284:
  E-mail: grigr@yandex.ru
  E-mail: grigr@yandex.ru
  Web site: http://grigr.narod.ru/
  Web site: http://grigr.narod.ru/
-
<br>
 
-
Kenyam Set A
 
-
Copyright (C) 2000-2006 by Kenya Maruyama
 
-
E-mail: rmckenyam@hotmail.com
 
-
Web Site: http://www.geocities.jp/rmcsokoban/soko/skrmc_a.htm
 
  <br>
  <br>
  SokEvo and SokHard level sets
  SokEvo and SokHard level sets
Line 508: Line 294:
  E-mail: sven.egevad@telia.com
  E-mail: sven.egevad@telia.com
  Web Site: unknown
  Web Site: unknown
 +
<br>
 +
Sokoban Perfect and Sokoban Revenge level sets
 +
Copyright (C) 1989, 1991 by Thinking Rabbit
 +
Web Site: https://sokoban.jp/
  <br>
  <br>
  Y.M. Auto and Y.M. Handmade level sets
  Y.M. Auto and Y.M. Handmade level sets
Line 514: Line 304:
  Web Site: http://www.ne.jp/asahi/ai/yoshio/sokoban/index.html
  Web Site: http://www.ne.jp/asahi/ai/yoshio/sokoban/index.html
  <br>
  <br>
-
  Box World
+
  JSoko
-
  Copyright (C) 1998 by Jeng-Long Jiang
+
  Copyright (C) by Matthias Meger
-
  E-mail: unknown
+
  E-mail: JSoko@mail.de
-
  Web Site: unknown
+
  Web site: https://www.sokoban-online.de
  <br>
  <br>
-
  Sokofan
+
  Sokoban Automatic Solver (aka Takaken solver)
-
  Copyright (C) 2005-2007 by Eric Leung
+
  Copyright (C) 2002 - 200X Ken'ichiro Takahashi (aka takaken)
-
  E-mail: eleung2@hotpop.com
+
  E-mail: takaken@ic-net.or.jp
-
  Web Site: unknown
+
  Web site: https://computerpuzzle.net/english/sokoban/ver740/index.html
  <br>
  <br>
-
  Sokoban YASC
+
  YASS - Yet Another Sokoban Solver and Optimizer - For Small Levels
  Copyright (C) 2007 by Brian Damgaard
  Copyright (C) 2007 by Brian Damgaard
-
  E-mail: BrianDamgaard@jubii.dk
+
  Web site: https://sourceforge.net/projects/sokobanyasc/
 +
<br>
 +
Sokoban YASC
 +
Copyright (C) 2001-2020 by Brian Damgaard
  Web Site: https://sourceforge.net/projects/sokobanyasc/
  Web Site: https://sourceforge.net/projects/sokobanyasc/
  <br>
  <br>
Line 538: Line 331:
  E-mail: andru@cs.cornell.edu
  E-mail: andru@cs.cornell.edu
  Web Site: http://www.cs.cornell.edu/andru/xsokoban.html
  Web Site: http://www.cs.cornell.edu/andru/xsokoban.html
 +
<br>
 +
Sokofan
 +
Copyright (C) 2005-2007 by Eric Leung
 +
E-mail: eleung2@hotpop.com
 +
Web Site: unknown
 +
<br>
 +
Sokolution
 +
Copyright (C) 2016-2019 by Florent DIEDLER
 +
E-mail: fdiedler2000@gmail.com
 +
Web site: https://sokolution.000webhostapp.com/
 +
<br>
 +
Festival
 +
Copyright (C) 2020 by Yaron Shoham
 +
Web site: https://festival-solver.site/
  <br>
  <br>
  Trademarks
  Trademarks
Line 548: Line 355:
  =======
  =======
  <br>
  <br>
-
  E-mail: sokoban@online.de
+
  E-mail: sokobanowiki@gmail.com

Current revision as of 19:04, 26 March 2024

A Sokoban solver program is a program that tries to solve Sokoban levels. There are several solver programs available. (See Sokoban solvers.)

Solver programs may have different objectives:

  1. Find any solution
  2. Find push optimal solutions
  3. Find push optimal solutions with best moves
  4. Find move optimal solutions
  5. Find move optimal solutions with best pushes

Given the computational complexity of these tasks, a solver program is usually designed for just finding any solution. If a solution is to be optimized, an optimizer program can be used. (See Optimizers.)

The statistics presented here provide a picture of what the best freely available Sokoban solvers can do.
For copyrights, credits and redistribution of these statistics, please read the disclaimer.


Contents

General benchmarking information

For practical reasons, almost all tests have been performed with a 10 minutes time limit. The tests are, however, not a 10 minutes contest but a showcase for what the solvers can do, so other time limits are entirely feasible.

The hardware used for the tests is a standard PC with a modern operating system (64bit).

Tests are performed with default solver settings.

Solver Version Author Architecture CPU usage Source code available More info
Festival 3.1 Yaron Shoham 64bit 8 threads Festival 3.1 Website with papers about the solver
Sokolution 6.33 Florent Diedler 64bit all threads no Sokoban solver "scribbles" by Florent Diedler
Takaken 7.4 Ken'ichiro Takahashi (takaken) 64bit 2 threads no Description of the used algorithms
Curry 0.3 Yaron Shoham 64bit 1 thread Curry 0.3 Website with paper about the solver
YASS 2.151 Brian Damgaard 32bit 1 thread YASS 2.151 Sokoban solver "scribbles" by Brian Damgaard
JSoko 2.04 Matthias Meger 64bit 1 thread JSoko 2.04 Solver information
Rolling Stone 1.0 Andreas Junghanns 32bit 1 thread RS Rolling Stone papers

Contact: SokobanoWiki@gmail.com

XSokoban Test Suite

The XSokoban level set is the de facto standard test suite in the academic literature on Sokoban solver programming.

Sokoban Solver Statistics - XSokoban Test Suite - Solved Levels
Collection Author Levels Rolling Stone Takaken YASS JSoko Sokolution Curry Festival
XSokoban Thinking Rabbit, ... 90 59* 90 89 67 90 90 90
Sokoban Solver Statistics - XSokoban Test Suite - Push-optimal Solutions
Collection Author Levels Rolling Stone Pereira et al. JSoko Sokolution
XSokoban Thinking Rabbit, ... 90 6 28 31 59

The statistic shows that Sokolution is by far the best solver when searching for push optimal solutions.

Large Test Suite

The large test suite comprises level packs selected for being a challenge for the solvers, but not too difficult. The statistics shows the results for the leading Sokoban solver programs.

This test suite is not subject to change, as it is intended to be a "Large Standard Test Suite" for Sokoban solver programs.

Sokoban Solver Statistics - Large Test Suite - Solved levels
Levels Festival Sokolution Takaken YASS
Total levels 3272 3205 3172 2953 2891

Click here to see the detailed results for the Large Test Suite.

Download the entire test suite here or the individual level sets from www.sokobano.de.

Open Test Suite

The statistics shows the results for the leading Sokoban solvers for various level collections. Please note that the grand totals are simple summations. The number of solved unique levels may differ slightly due to duplicate levels in the level packs.

This test suite may be changed by adding new level collections from time to time.

Sokoban Solver Statistics - Open Test Suite - Solved levels
Levels Festival Sokolution Takaken YASS
Total levels 4762 4634 4568 4207 4028

Click here to see the detailed results for the Open Test Suite.

Click here to see the detailed results for the Open Test Suite only for the various Sokolution versions.

GroupEffort Test Suite

The only reason for benchmarking the GroupEffort test suite is to demonstrate the limited veracity of the statement made in section "6 Conclusion" of the thesis, where the author writes that the GroupEffort solver "outperforms existing solvers".

The benchmarks show that this was only true for the cherry-picked small test set at the time the thesis was published, never for the presumably more representative large test set.

Sokoban Solver Statistics - GroupEffort Test Suite - Solved Levels
Collection Levels GroupEffort Festival Sokolution Takaken JSoko YASS
Small Set 200 196 (a)(c) 200 (b) 200 (a) 192 (b) 180 (b) 191 (b)
Large Set 2851 1566 (a)(c) 2766 (b) 2471 (a) 2462 (b) 2165 (b) 2260 (b)
Total 3051 1762 2966 2671 2654 2345 2471

(a): Time limit: 5 minutes     (b): Time limit: 10 minutes     (c): Best GroupEffort solver configuration

Disclaimer 

Sokoban
=======


Sokoban (R) Registered Trademark of Falcon Co., Ltd., Japan
Sokoban Copyright (C) 1982-2004 by Hiroyuki Imabayashi, Japan
Sokoban Copyright (C) 1989, 1990, 2001-2004 by Falcon Co., Ltd., Japan


License
=======


Redistribution and use of the Sokoban Solver statistics are permitted
provided that the following conditions are met: 


* Redistributions may not be sold, nor may they be used in a commercial product or activity.
* Redistributions must reproduce the entire content of this disclaimer in the documentation
  and/or other materials provided with the distribution.


Credits (in no particular order)
================================


CosmoNotes, CosmoPoly, LOMA, MicroCosmos, MiniCosmos,
NaboCosmos and PicoCosmos level sets
Copyright (C) by Aymeric du Peloux.
E-mail: aymeric.du-peloux@gadz.org
Web site: unknown


dh1, dh2, bagatelle, cantrip, and maelstrom level sets
Copyright (C) by David Holland
E-mail: unknown
Web site: unknown


Microban, Mas Microban, Sasquatch, Mas Sasquatch, Sasquatch III,
Sasquatch IV, Sasquatch V, Sasquatch VI and Sasquatch VII level sets.
Copyright (C) by David W. Skinner
E-mail: sasquatch@bentonrea.com
Web site: unknown


Grigr2001, Grigr2002 and GrigrSpecial level sets
Copyright (C) by Evgeny Grigoriev  (aka GRIGoRusha)
E-mail: grigr@yandex.ru
Web site: http://grigr.narod.ru/


SokEvo and SokHard level sets
Copyright (C) 2002-2006 by Lee J Haywood
E-mail: fruise@gmail.com
Web Site: http://leehaywood.org/games/sokoban/


Sven level set
Copyright (C) 2007 by Sven Egevad
E-mail: sven.egevad@telia.com
Web Site: unknown


Sokoban Perfect and Sokoban Revenge level sets
Copyright (C) 1989, 1991 by Thinking Rabbit
Web Site: https://sokoban.jp/


Y.M. Auto and Y.M. Handmade level sets
Copyright (C) Yoshio Murase 
E-mail: yoshio@asahi.email.ne.jp
Web Site: http://www.ne.jp/asahi/ai/yoshio/sokoban/index.html


JSoko
Copyright (C) by Matthias Meger
E-mail: JSoko@mail.de
Web site: https://www.sokoban-online.de


Sokoban Automatic Solver (aka Takaken solver)
Copyright (C) 2002 - 200X Ken'ichiro Takahashi (aka takaken)
E-mail: takaken@ic-net.or.jp
Web site: https://computerpuzzle.net/english/sokoban/ver740/index.html 


YASS - Yet Another Sokoban Solver and Optimizer - For Small Levels
Copyright (C) 2007 by Brian Damgaard
Web site: https://sourceforge.net/projects/sokobanyasc/


Sokoban YASC 
Copyright (C) 2001-2020 by Brian Damgaard
Web Site: https://sourceforge.net/projects/sokobanyasc/


YSokoban
Copyright (C) 2007 by George Petrov
E-mail: YGP@WriteMe.com
Web Site:  http://ygp.orgfree.com/sokoban.html


XSokoban
Copyright (C) by Andrew Myers
E-mail: andru@cs.cornell.edu
Web Site: http://www.cs.cornell.edu/andru/xsokoban.html


Sokofan
Copyright (C) 2005-2007 by Eric Leung
E-mail: eleung2@hotpop.com
Web Site: unknown


Sokolution
Copyright (C) 2016-2019 by Florent DIEDLER
E-mail: fdiedler2000@gmail.com
Web site: https://sokolution.000webhostapp.com/


Festival
Copyright (C) 2020 by Yaron Shoham
Web site: https://festival-solver.site/


Trademarks
========== 


Company names, brand names and product names are trademarks
or registered trademarks of their respective holders.


Contact
=======


E-mail: sokobanowiki@gmail.com

Retrieved from "http://sokobano.de/wiki/index.php?title=Solver_Statistics"
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