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Sokoban was invented and programmed by Hiroyuki Imabayashi in 1981 and published by Thinking Rabbit as a computer video game in 1982.
Sokoban levels are shared in a standard format called XSB, which is supported by all mainstream Sokoban programs.
In XSB format, a level is denoted in plain text by using the following characters:
@ ==> man
+ ==> man on goal
$ ==> box
* ==> box on goal
# ==> wall
. ==> goal
- ==> floor. Initially, XSB use only ' ' (space) to denote floor. But as consecutive spaces are treated as a single space
on web pages, XSB is extended to allow '-' (dash) or '_' (underscore) for denoting floor as well.
An XSB level is usally followed by two lines with the title and author information of the preceding level.
Example:
----#####---------- ----#---#---------- ----#$--#---------- --###--$##--------- --#--$-$-#--------- ###-#-##-#---###### #---#-##-#####--..# #-$--$----------..# #####-###-#@##--..# ----#-----######### ----#######-------- Title: Classic level 1 Author: Thinking Rabbit
Below is a graphical representation of the above XSB level.
Solutions to Sokoban levels are saved in a standard LURD format, with uppercase for push and lowercase for move.
l or L ==> left
r or R ==> right
u or U ==> up
d or D ==> down
A solution of the above level.
ullluuuLUllDlldddrRRRRRRRRRRdrUllllllluuululldDDuu lldddrRRRRRRRRRRRRlllllllluuulLulDDDuulldddrRRRRRR RRRRRllllllluuulluuurDDuullDDDDDuulldddrRRRRRRRRRR uRRlDllllllluuuLLulDDDuulldddrRRRRRRRRRRdRRlUlllll lllllllulldRRRRRRRRRRRRRuRDldR
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