Antichess Solution Explorer

r n b q k b . r p p . p p p p p . . p . . . . . . . . . P n . Q . . . . . . . . . . . . . . . . P P P P . P P P R N B . K B N R
MoveScore# Positions
♘e3#-22Loss30 793
♕a5#-22Loss13 125
♕c7#-22Loss3 467
♕b6#-17Loss2 570
♘d4#-17Loss1 499
d6#-17Loss826
h6#-17Loss806
♘g3#-17Loss297
♘d6#-17Loss56
♘h4#-16Loss237
a6#-16Loss191
f6#-16Loss55
g6#-16Loss42
b5#-16Loss28
♘a6#-16Loss24
a5#-15Loss37
c5#-15Loss33
b6#-15Loss24
♖g8#-15Loss22
d5#-15Loss21
♘h6#-15Loss14
e6#-15Loss14
g5#-15Loss14
1. e3 c6 2. e4 ♘h6 3. e5 ♘f5 4. ♕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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