Syzygy endgame tablebases

Black is winning DTM 15 DTZ 3

Qc1 DTM 29 Loss with DTZ 1 Qg1 DTM 29 Loss with DTZ 1 Qe7+ DTM 21 Loss with DTZ 1 Qf2 DTM 21 Loss with DTZ 1 Qf8+ DTM 21 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