Syzygy endgame tablebases

White is winning with DTZ 275

Rh4+ Win with DTZ 274

Kb1 Draw Rb4 Draw Rc1 Draw Rc2 Draw Re1 Draw Re2+ Draw Rg4 Draw

Ba6 Loss with DTZ 2 Ba8 Loss with DTZ 2 Bc6 Loss with DTZ 2 Bc8 Loss with DTZ 2 Bd5 Loss with DTZ 2 Ra4 Loss with DTZ 2 Rc3 Loss with DTZ 2 Rc5 Loss with DTZ 2 Rc6 Loss with DTZ 2 Rc7 Loss with DTZ 2 Rc8 Loss with DTZ 2 Rcd4 Loss with DTZ 2 Red4 Loss with DTZ 2 Re3 Loss with DTZ 2 Re5 Loss with DTZ 2 Re6 Loss with DTZ 2 Re7 Loss with DTZ 2 Re8 Loss with DTZ 2 Rf4 Loss with DTZ 2

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

KRRBvKRR.pgn lichess.org

Histogram: KRRB winning vs. KRR (log scale)

Longest KRRBvKRR phases

KRRBvKRR statistics (unique positions)

White wins:
224,086,160,932 (52.9%)

Frustrated white wins:
4,854,274,928 (1.1%)

Draws:
182,316,537,456 (43.0%)

Frustrated black wins:
8,328 (0.0%)

Black wins:
12,319,084,298 (2.9%)

KRRBvKRR.json (?)