Syzygy endgame tablebases
White to move
Black to move
JavaScript required for interactive board view.
Black is losing with DTZ 118
Rb1+
Loss with DTZ 117
Ra4+
Loss with DTZ 15
Rb2
Loss with DTZ 3
Rb3
Loss with DTZ 3
Re4
Loss with DTZ 3
Rb5
Loss with DTZ 1
Rb6
Loss with DTZ 1
Rb7
Loss with DTZ 1
Rb8
Loss with DTZ 1
Rc4
Loss with DTZ 1
Rd4
Loss with DTZ 1
Rf4
Loss with DTZ 1
Rg4
Loss with DTZ 1
Rh4
Loss with DTZ 1
This is a blessed loss.
Mate can be forced, but a draw can be achieved under the fifty-move rule.
KQBBBvKR.pgn
Histogram: KQBBB winning vs. KR (log scale)
⋮
Longest KQBBBvKR phases
KQBBB winning with DTZ 48
KQBBB winning with DTZ 119 (frustrated)
KQBBB losing with DTZ 3
KQBBBvKR statistics
420,546,864,192 (96.2%)
35,593,170 (0.0%)
16,546,778,850 (3.8%)
194,952,708 (0.0%)
KQBBBvKR.json
(?)