Syzygy endgame tablebases

Black is losing with DTZ 240

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

KRRRvKQP.pgn lichess.org

Histogram: KRRR winning vs. KQP (log scale)

Longest KRRRvKQP phases

KRRRvKQP statistics (unique positions)

White wins:
858,017,196,672 (69.8%)
Frustrated white wins:
18,589,974 (0.0%)
Draws:
298,104,364,548 (24.2%)
Frustrated black wins:
21,512,172 (0.0%)
Black wins:
73,879,959,930 (6.0%)
KRRRvKQP.json (?)