Antichess Solution Explorer

r n b q k b n r p . . p p p p p . p p . . . . . . . . . . . . Q . . . . P . . . . . . . . . . . P P P P . P P P R N B . K B N R
MoveScore# Positions
f5#-19Loss3 227
♕c7#-18Loss748
a6#-17Loss808
b5#-17Loss266
g6#-17Loss247
♘f6#-16Loss99
♘h6#-16Loss73
h6#-16Loss49
g5#-16Loss36
c5#-16Loss30
f6#-16Loss26
a5#-16Loss24
♗a6#-16Loss15
♗b7#-15Loss32
d5#-15Loss27
♘a6#-15Loss20
e5#-15Loss18
e6#-15Loss14
d6#-15Loss14
1. e3 c6 2. e4 b6 3. ♕h5
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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