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Syzygy endgame tablebases

Black is losing with DTZ 118

Rb1+ Loss with DTZ 117

Ka2 Loss with DTZ 7 Rb3 Loss with DTZ 5 Ra2 Loss with DTZ 3 Re2 Loss with DTZ 3 Rb4 Loss with DTZ 1 Rb5 Loss with DTZ 1 Rb6 Loss with DTZ 1 Rb7 Loss with DTZ 1 Rb8 Loss with DTZ 1 Rc2+ Loss with DTZ 1 Rd2 Loss with DTZ 1 Rf2 Loss with DTZ 1 Rg2 Loss with DTZ 1 Rh2 Loss with DTZ 1 c3 Zeroing

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

Histogram: KQB winning (log scale)

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Longest KQBvKRP phases

KQBvKRP statistics

19,667,644,569 (79.2%)

413,953 (0.0%)

2,252,349,565 (9.1%)

9,831 (0.0%)

2,907,686,432 (11.7%)

KQBvKRP.json (?)