Syzygy endgame tablebases

Black is losing with DTZ 110

Rc1+ Loss with DTZ 109

Rb6+ Loss with DTZ 15 Ra6 Loss with DTZ 1 Rc2 Loss with DTZ 1 Rc3 Loss with DTZ 1 Rc4 Loss with DTZ 1 Rc5 Loss with DTZ 1 Rc7 Loss with DTZ 1 Rc8 Loss with DTZ 1 Rd6 Loss with DTZ 1 Re6 Loss with DTZ 1 Rf6 Loss with DTZ 1 Rg6 Loss with DTZ 1 Rh6 Loss with DTZ 1 Kg2 Loss with DTZ 1

This is a blessed loss. Mate can be forced, but a draw can be achieved under the fifty-move rule.

KRRBvKR.pgn lichess.org

Histogram: KRRB winning vs. KR (log scale)

⋮

Longest KRRBvKR phases

KRRBvKR statistics (unique positions)

White wins:
6,999,234,042 (85.3%)

Frustrated white wins:
58,627 (0.0%)

Draws:
1,192,835,879 (14.5%)

Black wins:
8,641,700 (0.1%)

KRRBvKR.json (?)