Syzygy endgame tablebases

Black is losing with DTZ 4

KQBNvKBB.pgn lichess.org

Histogram: KQBN winning vs. KBB (log scale)

Longest KQBNvKBB phases

KQBNvKBB statistics (unique positions)

White wins:
382,561,435,109 (83.4%)
Frustrated white wins:
7,084,896 (0.0%)
Draws:
75,786,194,061 (16.5%)
Frustrated black wins:
187,639,146 (0.0%)
Black wins:
245,094,516 (0.1%)
KQBNvKBB.json (?)