Syzygy endgame tablebases

Black is losing with DTZ 114

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

KQRBvKQ.pgn lichess.org

Histogram: KQRB winning vs. KQ (log scale)

Longest KQRBvKQ phases

KQRBvKQ statistics (unique positions)

White wins:
5,515,273,162 (80.3%)
Frustrated white wins:
4,214 (0.0%)
Draws:
1,183,356,727 (17.2%)
Black wins:
170,581,243 (2.5%)
KQRBvKQ.json (?)