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Syzygy endgame tablebases

Black is losing with DTZ 10

KRRRvKB.pgn lichess.org

Histogram: KRRR winning vs. KB (log scale)

Longest KRRRvKB phases

KRRRvKB statistics

8,208,369,168 (99.9%)
8,081,526 (0.1%)
KRRRvKB.json (?)