Syzygy endgame tablebases

Black is winning with DTZ 108

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


Histogram: KQBB losing vs. KRB (log scale)

Longest KQBBvKRB phases

KQBBvKRB statistics (unique positions)

White wins:
342,044,462,884 (79.8%)
81,700,215,980 (19.1%)
Frustrated black wins:
48,320,038 (0.0%)
Black wins:
4,720,953,316 (1.1%)
KQBBvKRB.json (?)