Antichess Solution Explorer

r n b . k b n r p p . p p p p p . . p . . . . . . . . . P . . . . . . . . . . . . . . . . . . . R P P P . P P P . N B Q K B N R
MoveScore# Positions
c5#-25Loss56 269
a6#-23Loss68 084
h5#-19Loss1 518
a5#-16Loss165
h6#-15Loss65
f6#-15Loss52
♘f6#-15Loss30
b6#-15Loss24
b5#-15Loss15
♘h6#-15Loss14
♔d8#-15Loss14
♘a6#-15Loss14
g5#-15Loss14
f5#-15Loss14
e6#-14Loss20
g6#-14Loss13
d6#-13Loss15
d5#-13Loss15
1. e3 c6 2. e4 ♕a5 3. e5 ♕xa2 4. ♖xa2
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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