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Syzygy endgame tablebases

Black is losing with DTZ 178

Rd6 Loss with DTZ 177

Rb6 Loss with DTZ 15 Ra6 Loss with DTZ 11 Rc7+ Loss with DTZ 3 Rc3 Loss with DTZ 1 Rc4 Loss with DTZ 1 Rc5 Loss with DTZ 1 Rc8 Loss with DTZ 1 Re6 Loss with DTZ 1 Rf6 Loss with DTZ 1 Rg6+ Loss with DTZ 1 Rh6 Loss with DTZ 1 Kc1 Loss with DTZ 1 Kc3 Loss with DTZ 1 Ke1 Loss with DTZ 1 Ke2 Loss with DTZ 1 Ke3 Loss with DTZ 1 Rxc2 Zeroing Kxc2 Zeroing

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

Histogram: KBBPP winning vs. KR (log scale)

Longest KBBPPvKR phases

KBBPPvKR statistics

916,430,259,228 (76.3%)

231,133,604 (0.0%)

280,980,817,720 (23.4%)

3,681,936,256 (0.3%)

KBBPPvKR.json (?)