Syzygy endgame tablebases

Black is losing with DTZ 154

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

KQBBNvKQ.pgn lichess.org

Histogram: KQBBN winning vs. KQ (log scale)

Longest KQBBNvKQ phases

KQBBNvKQ statistics (unique positions)

White wins:
353,014,828,198 (87.0%)
Frustrated white wins:
6,589,650 (0.0%)
Draws:
34,586,441,480 (8.5%)
Frustrated black wins:
1,782,146,704 (0.4%)
Black wins:
16,394,486,770 (4.0%)
KQBBNvKQ.json (?)