Syzygy endgame tablebases

Black is losing with DTZ 4

KRRRvK.pgn lichess.org

Histogram: KRRR winning vs. K (log scale)

Longest KRRRvK phases

KRRRvK statistics

149,991,834 (99.4%)
917,946 (0.6%)
KRRRvK.json (?)