Syzygy endgame tablebases

Black is losing with DTZ 164

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


Histogram: KRRB winning vs. KQ (log scale)

Longest KRRBvKQ phases

KRRBvKQ statistics (unique positions)

White wins:
4,924,729,003 (66.3%)
Frustrated white wins:
693,854 (0.0%)
2,116,388,889 (28.5%)
Black wins:
385,609,706 (5.2%)
KRRBvKQ.json (?)