Syzygy endgame tablebases

Black is losing with DTZ 132

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

KQRBPvKR.pgn lichess.org

Histogram: KQRBP winning vs. KR (log scale)

Longest KQRBPvKR phases

KQRBPvKR statistics (unique positions)

White wins:
1,333,892,625,811 (99.6%)
Frustrated white wins:
394,857 (0.0%)
Draws:
3,996,660,926 (0.3%)
Black wins:
932,422,202 (0.1%)
KQRBPvKR.json (?)