Syzygy endgame tablebases

Black is losing with DTZ 490

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


Histogram: KRRB winning vs. KQP (log scale)

Longest KRRBvKQP phases

KRRBvKQP statistics (unique positions)

White wins:
763,777,542,062 (58.9%)
Frustrated white wins:
775,150,920 (0.1%)
263,488,895,386 (20.3%)
Frustrated black wins:
187,339,158 (0.0%)
Black wins:
269,440,711,310 (20.8%)
KRRBvKQP.json (?)