Syzygy endgame tablebases

Black is winning DTM 11 DTZ 3

Qc6 DTM 33 Loss with DTZ 1 Qh1+ DTM 33 Loss with DTZ 1 Qa6 DTM 31 Loss with DTZ 1 Qb6 DTM 31 Loss with DTZ 1 Qg2+ DTM 31 Loss with DTZ 1 Qg7 DTM 31 Loss with DTZ 1

KRvKQ.pgn lichess.org

Histogram: KR losing vs. KQ (log scale)

Longest KRvKQ phases

KRvKQ statistics (unique positions)

White wins:
388,455 (15.7%)

Draws:
87,481 (3.5%)

Black wins:
1,991,186 (80.7%)

KRvKQ dependencies

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

KQvKR.txt KQvKR.dot