Antichess Solution Explorer

r n b q k b n r p . p p p . p p p . . . . . . . . . . . . . . Q . . . . p . . . . . . . . . . . P P P P . P P P R N B . K . N R
MoveScore# Positions
e3#-22Loss91 900
♘f6#-21Loss33 135
♘h6#-21Loss27 966
h6#-21Loss25 512
a5#-17Loss5 859
♔f7#-17Loss2 114
c5#-17Loss1 433
g6#-16Loss441
g5#-15Loss145
d5#-14Loss277
c6#-14Loss118
d6#-14Loss51
♗b7#-14Loss45
e6#-14Loss21
e5#-13Loss56
♘c6#-13Loss12
1. e3 f5 2. e4 fxe4 3. ♗a6 bxa6 4. ♕h5
Watkins Opening
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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