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Syzygy endgame tablebases

Black is losing with DTZ 114

Bf3 Loss with DTZ 113

Bc2 Loss with DTZ 3 Be2 Loss with DTZ 3 Ka3 Loss with DTZ 1 Ka5 Loss with DTZ 1 Kb3 Loss with DTZ 1 Kb4 Loss with DTZ 1 Kb5 Loss with DTZ 1 Bb3 Loss with DTZ 1 Bg4 Loss with DTZ 1 Bh5 Loss with DTZ 1 a1=B Zeroing a1=N Zeroing a1=Q Zeroing a1=R Zeroing

This is a blessed loss. Mate can be forced, but a draw can be achieved under the fifty-move rule.

Histogram: KRRR winning vs. KBP (log scale)

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Longest KRRRvKBP phases

KRRRvKBP statistics

1,404,881,530,614 (98.6%)

450,893,886 (0.0%)

13,463,484,396 (0.9%)

15,286,098 (0.0%)

5,771,072,094 (0.4%)

KRRRvKBP.json (?)