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.


Histogram: KRRR winning vs. KRB (log scale)

Longest KRRRvKRB phases

KRRRvKRB statistics (unique positions)

White wins:
353,453,456,802 (83.3%)
Frustrated white wins:
32,328 (0.0%)
70,004,568,855 (16.5%)
Frustrated black wins:
14,754 (0.0%)
Black wins:
794,713,233 (0.2%)
KRRRvKRB.json (?)