Syzygy endgame tablebases

Black is losing with DTZ 68

KRRRvKRR.pgn lichess.org

Histogram: KRRR winning vs. KRR (log scale)

Longest KRRRvKRR phases

KRRRvKRR statistics (unique positions)

White wins:
304,112,012,106 (75.8%)
Draws:
88,474,448,976 (22.1%)
Black wins:
8,437,181,862 (2.1%)
KRRRvKRR.json (?)