Syzygy endgame tablebases
White to move
Black to move
JavaScript required for interactive board view.
Black is losing with DTZ 202
Kg3
Loss with DTZ 201
Kg2
Loss with DTZ 55
Kg1
Loss with DTZ 49
Qh5
Loss with DTZ 1
This is a blessed loss.
Mate can be forced, but a draw can be achieved under the fifty-move rule.
KRRNvKQ.pgn
lichess.org
Histogram: KRRN winning vs. KQ (log scale)
Longest KRRNvKQ phases
KRRN winning with DTZ 100
KRRN winning with DTZ 202 (frustrated)
KRRN losing with DTZ 37
KRRNvKQ statistics (unique positions)
White wins:
4,780,344,691 (63.0%)
Frustrated white wins:
996,368 (0.0%)
Draws:
2,097,628,333 (27.6%)
Black wins:
712,740,904 (9.4%)
KRRNvKQ.json
(?)