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H. G. Muller wrote on Thu, May 16, 2019 08:49 AM UTC:

FairyGen is just a set of Windows .exe files, one for each number of men (e.g. 4men.exe), it doesn't need anything else.  The FairyGen package contains a README.txt file with info on how to use it, but basically one just opens a command-prompt window, goes to the folder where the package was unzipped, and types a command like "4men -s KR.WR" (to generate royal King + Rook vs royal Wazir + Rook). The "-s" option specifies that stalemat should be considered a win. It then already prints some statistics info during generation, which you can ignore, and finally gets into a loop where you interactively can specify individual positions in this end-game that you want to probe, which you can immediately quit by hitting Ctrl-C. You can then find the stats of the end-game on a file "rep2.txt", in the following format: 


WR_W stalewin

WON.wtm      62496
K capture    16352
other        46144
  0.          1671
 10.           404
 11.           968
 12.          3082
 13.          6133
 14.         12997
 15.         16010
 16.         14704
 17.          3136
WON.btm      57434
stalemate        0
W check       3391
LEGAL        59105
TOTAL        62496

WON.wtm gives the number of positions that white can win when he has the move, WON.btm the white wins with black to move. These are split up by distance to conversion (mate or capture) on the lines above, starting at 10 (so 11 means mated in 1 etc.) The total includes also 'illegal' positions where a King can be captured; their number with white to move is listed after 'K capture', and also gives an impression of how many of the listed wtm wins are due to immediate capture of possible other black pieces (although these sometimes will be protected).

If two or more of the pieces are color bound, the statistics will automatically be split into the like and unlike case, and presented in multiple columns.


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