Syzygy endgame tablebases

Black is losing with DTZ 154

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

KRRRNvKQ.pgn lichess.org

Histogram: KRRRN winning vs. KQ (log scale)

Longest KRRRNvKQ phases

KRRRNvKQ statistics (unique positions)

White wins:
378,096,744,930 (94.2%)
Frustrated white wins:
25,199,094 (0.0%)
Draws:
20,835,328,911 (5.2%)
Black wins:
2,452,383,741 (0.6%)
KRRRNvKQ.json (?)