Syzygy endgame tablebases
White to move
Black to move
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Black is winning with DTZ 249
Ka3
Win with DTZ 248
Kb3
Draw
Ka2
Loss with DTZ 1
Kxa1
Zeroing
This is a cursed win.
Mate can be forced, but a draw can be achieved under the fifty-move rule.
KQBBvKQQ.pgn
lichess.org
Histogram: KQBB losing vs. KQQ (log scale)
Longest KQBBvKQQ phases
KQBB winning with DTZ 100
KQBB winning with DTZ 144 (frustrated)
KQBB losing with DTZ 249 (frustrated)
KQBB losing with DTZ 100
KQBBvKQQ statistics (unique positions)
White wins:
73,255,125,086 (21.6%)
Frustrated white wins:
47,379,422 (0.0%)
Draws:
66,887,261,032 (19.7%)
Frustrated black wins:
2,955,100,724 (0.9%)
Black wins:
196,135,819,030 (57.8%)
KQBBvKQQ.json
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