Syzygy endgame tablebases

Black is losing with DTZ 35

KRvKB.pgn lichess.org

Histogram: KR winning vs. KB (log scale)

Longest KRvKB phases

KRvKB statistics (unique positions)

White wins:
521,183 (18.4%)
Draws:
2,305,921 (81.6%)
KRvKB.json (?)