Antichess Solution Explorer

r n b q k b n r p . p p p . p p p . . . . p . . . . . . . . . . . . . . P . . . . . . . . . . . P P P P . P P P R N B Q K . N R
MoveScore# Positions
h5#-25Loss88 697
g5#-25Loss9 953
f5#-22Loss107 994
d5#-22Loss48 894
c6#-22Loss25 011
c5#-21Loss8 581
♔f7#-19Loss6 077
♘h6#-19Loss3 812
a5#-18Loss3 080
h6#-17Loss1 643
g6#-16Loss79
♘c6#-15Loss226
e5#-15Loss108
e6#-14Loss87
d6#-14Loss16
♗b7#-14Loss15
1. e3 f6 2. ♗a6 bxa6 3. e4
Iranian Defence
Open on Lichess

The site features solutions for some antichess openings, providing a path that White or Black can follow so as to defeat any defense. The solutions will be gradually updated and supplemented.

The solutions of Mark Watkins, Klaas Steenhuis, and Cătălin Frâncu were partially used. Pierre Caetano's suggestions regarding reducing the maximum winning length are included in 1.f4, 1.♘c3, 1.e3 f6, and 1.e3 b5 lines. Credit to Vladica Andrejić for most of the opening names and their proof status. Pedro Re's suggestions regarding reducing the maximum winning length are included in 1.a3, 1.h3, 1.c3, 1.b4, 1.♘c3, 1.h4, 1.f4, 1.♘f3, 1.c4 ♘h6, 1.c4 b5, 1.e3 c6, 1.e3 b5 2.♗xb5 ♗a6, 1.e3 c5, and 1.e3 b5. Yabba's suggestions are included in 1.h3, 1.e3 g5, 1.e3 ♘c6, 1.e3 c5 2.♗b5 e6/a5/b6/♕c7/♕a5/Nh6, and 1.e3 b5 2.♗xb5 e6 3.♗xd7 ♗xd7 4.♘h3 ♘e7. Awkwardmammal's suggestions are included in 1.e3 b6, 1.e3 g5, and 1.e3 a5. Thanks to ChessDemon989 for his help with comprehension of the technical aspects of Watkins solutions and the factoradic in the context of its application to endgame tablebases.
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