Syzygy endgame tablebases

Black is losing with DTZ 16

KQBBvKQ.pgn lichess.org

Histogram: KQBB winning vs. KQ (log scale)

Longest KQBBvKQ phases

KQBBvKQ statistics (unique positions)

White wins:
4,820,374,547 (67.8%)
Frustrated white wins:
1,448,774 (0.0%)
Draws:
1,393,393,258 (19.6%)
Frustrated black wins:
76,776,090 (1.1%)
Black wins:
821,158,283 (11.5%)
KQBBvKQ.json (?)