Th3Nu8 wrote:
Mistake in this one. After the 2nd Qa2+ black can block with the same rook.Rook. the cyclical queen check in the puzzle with 6 rooks and a white bishop.
Mates that are difficult for engines
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This is the first time I have seen a good problem from my underpromotion thread, confuse stockfish so much. I plugged it into stockfish for analysis and it kept flipping between so many different moves at first, despite the win not being too long: