Syzygy endgame tablebases

Black is losing with DTZ 20

KRRRvKBB.pgn lichess.org

Histogram: KRRR winning vs. KBB (log scale)

Longest KRRRvKBB phases

KRRRvKBB statistics (unique positions)

White wins:
436,468,843,506 (98.7%)
Draws:
5,668,623,990 (1.3%)
Black wins:
73,872,792 (0.0%)
KRRRvKBB.json (?)