What is the hardest mate-in-3 puzzle? - Quora

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What are some of the toughest chess puzzles? - Quora

What is the hardest mate-in-3 puzzle? - Quora

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In chess, could the king kill other pieces, no matter if it is checked or not? - Quora

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What is the definition of an open file (for the rook) in chess? - Quora

What are some examples of some situations in chess when it is worth it to sacrifice the queen? - Quora

What is the hardest mate-in-3 puzzle? - Quora

Mate in 3 - improve at tactics with these 10 chess puzzles