Syzygy endgame tablebases

Black is losing with DTZ 48

KQQRvKR.pgn lichess.org

Histogram: KQQR winning vs. KR (log scale)

Longest KQQRvKR phases

KQQRvKR statistics (unique positions)

White wins:
6,899,922,162 (99.9%)
Draws:
3,269,664 (0.0%)
Black wins:
2,643,256 (0.0%)
KQQRvKR.json (?)