Syzygy endgame tablebases

White is winning with DTZ 163

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

KQRRvKQB.pgn lichess.org

Histogram: KQRR winning vs. KQB (log scale)

Longest KQRRvKQB phases

KQRRvKQB statistics

280,241,476,261 (78.5%)
1,125,682 (0.0%)
43,410,145,395 (12.2%)
59,658,138 (0.0%)
33,204,871,590 (9.3%)
KQRRvKQB.json (?)