Syzygy endgame tablebases

Black is losing with DTZ 10

Kd4 DTM 13 Loss with DTZ 9 Kd5 DTM 13 Loss with DTZ 9 Kc3 DTM 11 Loss with DTZ 7 Kc5 DTM 11 Loss with DTZ 7 Kd3 DTM 11 Loss with DTZ 7 Kb4 DTM 9 Loss with DTZ 5 Kb3 DTM 7 Loss with DTZ 5 Kb5 DTM 7 Loss with DTZ 5

KRRvK.pgn lichess.org

Histogram: KRR winning vs. K (log scale)

Longest KRRvK phases

KRR winning with DTZ 11

KRRvK statistics (unique positions)

White wins:
2,743,951 (99.8%)

Draws:
4,900 (0.2%)