Syzygy endgame tablebases

Black is losing with DTZ 120

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

KQvKBB.pgn lichess.org

Histogram: KQ winning vs. KBB (log scale)

Longest KQvKBB phases

KQvKBB statistics (unique positions)

White wins:
110,211,519 (76.0%)
Frustrated white wins:
5,115,092 (3.5%)
Draws:
17,433,199 (12.0%)
Black wins:
12,181,184 (8.4%)
KQvKBB.json (?)