Syzygy endgame tablebases

Black is losing with DTZ 8

KRRRRBvK.pgn lichess.org

Histogram: KRRRRB winning vs. K (log scale)

Longest KRRRRBvK phases

KRRRRBvK statistics (unique positions)

White wins:
460,155,518,808 (98.1%)
Draws:
8,746,961,676 (1.9%)
KRRRRBvK.json (?)