Antichess Solution Explorer

r n b q k b . r . . . p p p p p p . p . . . . n . . . . P . . . . . . . . . . . . . N . . . . . P P P P . P P P R . B Q K . N R
MoveScore# Positions
♘g4#-32Loss188 921
♘f5#-23Loss14 261
f6#-22Loss34 194
f5#-22Loss34 194
♖a7#-19Loss16 833
♕a5#-19Loss14 823
♖g8#-19Loss9 875
♘g8#-19Loss9 679
d6#-18Loss1 543
d5#-18Loss1 543
♕c7#-18Loss886
♕b6#-17Loss1 647
c5#-16Loss837
a5#-16Loss837
e6#-16Loss426
g5#-15Loss62
♗b7#-15Loss27
g6#-15Loss15
1. e3 c6 2. e4 a6 3. ♗xa6 bxa6 4. e5 ♘h6 5. ♘c3
Andryushkov DefenceSteenhuis's Proof
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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