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.

KQRBvKR.pgn lichess.org

Histogram: KQRB winning vs. KR (log scale)

Longest KQRBvKR phases

KQRBvKR statistics (unique positions)

White wins:
7,023,425,050 (91.9%)
Frustrated white wins:
30,654 (0.0%)
Draws:
613,848,496 (8.0%)
Black wins:
5,259,942 (0.1%)
KQRBvKR.json (?)