Syzygy endgame tablebases

Black is losing with DTZ 145

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

KRRvKRN.pgn lichess.org

Histogram: KRR winning vs. KRN (log scale)

Longest KRRvKRN phases

KRRvKRN statistics (unique positions)

White wins:
3,483,749,812 (42.1%)
Frustrated white wins:
66,776 (0.0%)
Draws:
4,743,405,560 (57.3%)
Black wins:
49,563,668 (0.6%)
KRRvKRN.json (?)