Syzygy endgame tablebases

Black is losing with DTZ 121

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


Histogram: KPPP winning vs. KRB (log scale)

Longest KPPPvKRB phases

KPPPvKRB statistics (unique positions)

White wins:
183,257,921,148 (19.3%)
Frustrated white wins:
21,921,078 (0.0%)
99,064,122,420 (10.4%)
Frustrated black wins:
184,140 (0.0%)
Black wins:
668,976,578,118 (70.3%)
KPPPvKRB.json (?)