Syzygy endgame tablebases

Black is winning with DTZ 151

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

KQBNvKQQ.pgn lichess.org

Histogram: KQBN losing vs. KQQ (log scale)

Longest KQBNvKQQ phases

KQBNvKQQ statistics (unique positions)

White wins:
69,519,089,900 (19.8%)
Frustrated white wins:
166,548 (0.0%)
Draws:
64,064,478,628 (18.2%)
Frustrated black wins:
173,820 (0.0%)
Black wins:
218,011,717,592 (62.0%)
KQBNvKQQ.json (?)