Syzygy endgame tablebases

Black is losing with DTZ 160

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


Histogram: KQQR winning vs. KQR (log scale)

Longest KQQRvKQR phases

KQQRvKQR statistics (unique positions)

White wins:
269,305,491,672 (85.6%)
Frustrated white wins:
1,269,668 (0.0%)
23,821,241,253 (7.6%)
Frustrated black wins:
649,344 (0.0%)
Black wins:
21,600,960,391 (6.9%)
KQQRvKQR.json (?)