Syzygy endgame tablebases
White to move
Black to move
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Tablebase draw
Qxd3
Draw
Qg1
Loss with DTZ 3
Qa1
Loss with DTZ 1
Qb2
Loss with DTZ 1
Qc1
Loss with DTZ 1
Qc2
Loss with DTZ 1
Qd1
Loss with DTZ 1
Qe1
Loss with DTZ 1
Qf1+
Loss with DTZ 1
Qh1
Loss with DTZ 1
Bc4
Loss with DTZ 1
Bc8
Loss with DTZ 1
Bd5
Loss with DTZ 1
Bd7
Loss with DTZ 1
Bf5
Loss with DTZ 1
Bf7
Loss with DTZ 1
Bg4
Loss with DTZ 1
Bg8
Loss with DTZ 1
Bh3
Loss with DTZ 1
Qxa2
Zeroing
Qxb3
Zeroing
Bxb3
Zeroing
KQRBvKQB.pgn
lichess.org
Histogram: KQRB winning vs. KQB (log scale)
Longest KQRBvKQB phases
KQRB winning with DTZ 100
KQRB winning with DTZ 160 (frustrated)
KQRB losing with DTZ 90
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
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