Syzygy endgame tablebases

White is losing with DTZ 315

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

KRRNvKQB.pgn lichess.org

Histogram: KRRN losing vs. KQB (log scale)

Longest KRRNvKQB phases

KRRNvKQB statistics (unique positions)

White wins:
147,873,806,044 (35.6%)
Frustrated white wins:
8,046,198 (0.0%)
Draws:
106,992,881,733 (25.7%)
Frustrated black wins:
89,544,775 (0.0%)
Black wins:
160,797,077,118 (38.7%)
KRRNvKQB.json (?)