Antichess Solution Explorer

r n b . k b n r p p . p p p p p . . p . . . . . . . . . P . . . . . . . . . . . . . . . . . . . P P P N . P P P R . B Q K B N R
MoveScore# Positions
a6#-20Loss24 299
b5#-19Loss2 570
♔d8#-18Loss2 234
♘h6#-18Loss1 235
g5#-17Loss1 349
h5#-17Loss1 030
h6#-16Loss1 468
♘a6#-16Loss513
f6#-16Loss505
f5#-16Loss505
c5#-16Loss292
b6#-16Loss267
g6#-16Loss146
a5#-16Loss116
♘f6#-15Loss81
e6#-15Loss62
d6#-14Loss27
d5#-14Loss27
1. e3 c6 2. e4 ♕a5 3. e5 ♕xd2 4. ♘xd2
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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