Syzygy endgame tablebases

Black is losing with DTZ 106

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


Histogram: KQRR winning vs. KRN (log scale)

Longest KQRRvKRN phases

KQRRvKRN statistics (unique positions)

White wins:
391,251,179,573 (95.7%)
Frustrated white wins:
631,186 (0.0%)
17,237,623,303 (4.2%)
Black wins:
423,550,528 (0.1%)
KQRRvKRN.json (?)