Syzygy endgame tablebases

Black is losing with DTZ 134

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

KQRBBvKQ.pgn lichess.org

Histogram: KQRBB winning vs. KQ (log scale)

Longest KQRBBvKQ phases

KQRBBvKQ statistics (unique positions)

White wins:
345,122,778,352 (90.0%)
Frustrated white wins:
5,958,836 (0.0%)
Draws:
36,069,488,817 (9.4%)
Frustrated black wins:
168,220,956 (0.0%)
Black wins:
2,189,394,737 (0.6%)
KQRBBvKQ.json (?)