Syzygy endgame tablebases

Black is losing with DTZ 12

Rb3+ Loss with DTZ 11 Re6 Loss with DTZ 3 Ra3 Loss with DTZ 1 Rc3 Loss with DTZ 1 Rd3 Loss with DTZ 1 Re1 Loss with DTZ 1 Re2 Loss with DTZ 1 Re4 Loss with DTZ 1 Re5 Loss with DTZ 1 Re7 Loss with DTZ 1 Re8 Loss with DTZ 1 Rf3 Loss with DTZ 1 Rg3 Loss with DTZ 1 Rh3 Loss with DTZ 1

KRRRBvKR.pgn lichess.org

Histogram: KRRRB winning vs. KR (log scale)

⋮

Longest KRRRBvKR phases

KRRRBvKR statistics (unique positions)

White wins:
437,508,060,186 (99.8%)

Frustrated white wins:
33,522 (0.0%)

Draws:
638,156,682 (0.1%)

Black wins:
267,261,108 (0.1%)

KRRRBvKR.json (?)