Syzygy endgame tablebases

Black is losing with DTZ 110

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

KQRBvKRB.pgn lichess.org

Histogram: KQRB winning vs. KRB (log scale)

Longest KQRBvKRB phases

KQRBvKRB statistics (unique positions)

White wins:
359,282,609,785 (86.6%)
Frustrated white wins:
224,886 (0.0%)
Draws:
54,131,171,732 (13.0%)
Frustrated black wins:
9,682 (0.0%)
Black wins:
1,422,848,625 (0.3%)
KQRBvKRB.json (?)