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.

KQRvKBB.pgn lichess.org

Histogram: KQR winning vs. KBB (log scale)

Longest KQRvKBB phases

KQRvKBB statistics (unique positions)

White wins:
6,464,566,216 (83.1%)
Frustrated white wins:
12,458,948 (0.2%)
Draws:
1,288,271,526 (16.6%)
Black wins:
10,516,394 (0.1%)
KQRvKBB.json (?)