Syzygy endgame tablebases

Black is losing with DTZ 154

Qd3+ Loss with DTZ 153

Qe4 Loss with DTZ 4 Qf5 Loss with DTZ 2 Qg6 Loss with DTZ 2 Qa1 Loss with DTZ 1 Qb2 Loss with DTZ 1 Qc2+ Loss with DTZ 1 Qh7 Loss with DTZ 1 Kb4 Loss with DTZ 1 Qxa2 Zeroing Qxc1+ Zeroing

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 (?)

KRRRNvKQ dependencies

To probe all KRRRNvKQ positions, these tables and their transitive dependencies are also required:

KRRRNvK · KRRNvKQ · KRRRvKQ

KRRRNvKQ.txt KRRRNvKQ.dot