Syzygy endgame tablebases

Invalid position

The given position is not a legal chess position.

Histogram: KRRR losing vs. KP (log scale)

Longest KRRRvKP phases

KRRRvKP statistics (unique positions)

White wins:
26,375,594,898 (99.5%)
Frustrated white wins:
1,854 (0.0%)
Draws:
129,077,550 (0.5%)
Black wins:
8,915,394 (0.0%)
KRRRvKP.json (?)