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. KRN (log scale)

Longest KRRRvKRN phases

KRRRvKRN statistics (unique positions)

White wins:
389,078,673,105 (89.2%)
Frustrated white wins:
1,724,229 (0.0%)
46,321,083,918 (10.6%)
Black wins:
674,346,516 (0.2%)
KRRRvKRN.json (?)