Syzygy endgame tablebases

Black is winning with DTZ 142

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

KRBBPvKQ.pgn lichess.org

Histogram: KRBBP losing vs. KQ (log scale)

Longest KRBBPvKQ phases

KRBBPvKQ statistics (unique positions)

White wins:
727,872,993,812 (53.7%)
Frustrated white wins:
13,053,407,274 (1.0%)
Draws:
447,419,064,034 (33.0%)
Frustrated black wins:
8,361,656,942 (0.6%)
Black wins:
157,978,130,642 (11.7%)
KRBBPvKQ.json (?)