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 . R N B Q K . N R
MoveScore# Positions
f3#-19Loss27 649
♕c7#-17Loss12 945
♕a5#-17Loss2 788
♕b6#-17Loss2 092
b4#-15Loss5 455
h6#-15Loss3 391
a5#-15Loss768
h5#-15Loss534
a6#-15Loss447
♗a6#-14Loss195
d6#-14Loss117
d5#-14Loss117
♗h6#-14Loss66
e6#-14Loss46
f6#-14Loss35
f5#-14Loss35
♘a6#-14Loss28
♘f6#-14Loss23
♗b7#-14Loss19
♘c6#-13Loss23
♘h6#-13Loss14
♗g7#-13Loss12
1. e3 c6 2. e4 b5 3. ♗xb5 cxb5 4. e5 g5 5. f4 gxf4 6. h4
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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