What is the hardest mate-in-4 puzzle? - Quora
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Mate in 4 chess puzzles – Solve Chess Problem in Four Moves
What are the most difficult IQ questions? - Quora
How to fool's mate in chess - Quora
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Could you show a few chess tactic problems that are easy for beginners, but hard for experts? - Quora
What is the toughest puzzle book? - Quora

The hardest chess problem ever? Seems simple at first, but I bet no one will manage to solve it. : r/chess
Why are chess pieces given different points when only the game matters? Or do the points matter in some cases? If yes, then can you explain those cases? - Quora
In a game of chess, if for every white move, black makes two consecutive moves, then can we have a winning strategy for black? - Quora
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How to win chess in 4 moves as white - Quora
How many arrangements of chess pieces on a chess board are there, assuming the pieces got to their positions through legal moves? - Quora
When would you want to promote your pawn to a rook? - Quora
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