Antichess Solution Explorer

. n b q k b n r r . . p p p p p p . p . . . . . . . . . P . . . . . . . . . . . . . N . . . . . P P P P . P P P R . B Q K . N R
MoveScore# Positions
♘f6#-21Loss18 298
g5#-19Loss42 430
♘h6#-19Loss16 833
♖a8#-19Loss9 679
f6#-19Loss6 177
f5#-19Loss6 177
h6#-18Loss22 413
♕a5#-18Loss17 044
♕c7#-18Loss6 207
d6#-18Loss1 567
d5#-18Loss1 567
h5#-18Loss1 147
♖c7#-17Loss4 615
♕b6#-17Loss2 319
♖b7#-16Loss280
g6#-16Loss103
a5#-15Loss108
e6#-15Loss34
c5#-15Loss32
♗b7#-15Loss19
1. e3 c6 2. e4 a6 3. ♗xa6 bxa6 4. e5 ♖a7 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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