Syzygy endgame tablebases

Black is losing with DTZ 108

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

KQBBNvKR.pgn lichess.org

Histogram: KQBBN winning vs. KR (log scale)

Longest KQBBNvKR phases

KQBBNvKR statistics (unique positions)

White wins:
429,543,979,989 (95.5%)
Frustrated white wins:
4,750,384 (0.0%)
Draws:
19,837,451,405 (4.4%)
Black wins:
267,389,312 (0.1%)
KQBBNvKR.json (?)