Syzygy endgame tablebases

Black is losing with DTZ 28

KQQvKR.pgn lichess.org

Histogram: KQQ winning vs. KR (log scale)

Longest KQQvKR phases

KQQvKR statistics (unique positions)

White wins:
125,118,619 (99.8%)
Draws:
163,643 (0.1%)
Black wins:
109,426 (0.1%)
KQQvKR.json (?)