Syzygy endgame tablebases

Black is losing with DTZ 108

Nc3+ Loss with DTZ 107

Rb2+ Loss with DTZ 3 Nb2 Loss with DTZ 1 Ne3 Loss with DTZ 1 Nf2 Loss with DTZ 1 Kf8 Loss with DTZ 1 Ra2 Loss with DTZ 1 Rc2 Loss with DTZ 1 Rd2 Loss with DTZ 1 Re2 Loss with DTZ 1 Rf2 Loss with DTZ 1 Rg1 Loss with DTZ 1 Rg3 Loss with DTZ 1 Rg4 Loss with DTZ 1 Rh2 Loss with DTZ 1 Kxd7 Zeroing Rxg5 Zeroing

This is a blessed loss. Mate can be forced, but a draw can be achieved under the fifty-move rule.

KRRRvKRN.pgn lichess.org

Histogram: KRRR winning vs. KRN (log scale)

⋮

Longest KRRRvKRN phases

KRRRvKRN statistics

389,078,673,105 (89.2%)

1,724,229 (0.0%)

46,321,083,918 (10.6%)

674,346,516 (0.2%)

KRRRvKRN.json (?)