Syzygy endgame tablebases

Black is losing with DTZ 107

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

KRRvKRB.pgn lichess.org

Histogram: KRR winning vs. KRB (log scale)

Longest KRRvKRB phases

KRRvKRB statistics (unique positions)

White wins:
2,599,367,142 (32.2%)
Frustrated white wins:
1,032 (0.0%)
Draws:
5,386,932,735 (66.8%)
Frustrated black wins:
21,951 (0.0%)
Black wins:
75,231,896 (0.9%)
KRRvKRB.json (?)