Syzygy endgame tablebases

Black is losing with DTZ 2

Qh7 Loss with DTZ 1 Bh3 Loss with DTZ 1

KQRBvKQB.pgn lichess.org

Histogram: KQRB winning vs. KQB (log scale)

Longest KQRBvKQB phases

KQRBvKQB statistics (unique positions)

White wins:
255,057,420,229 (68.1%)

Frustrated white wins:
476,792 (0.0%)

Draws:
66,012,401,214 (17.6%)

Black wins:
53,593,900,747 (14.3%)

KQRBvKQB.json (?)