What is the hardest mate-in-4 puzzle? - Quora

What are some of the toughest chess puzzles? - Quora

What is the solution of this chess puzzle? - Quora

The hardest chess problem ever? Seems simple at first, but I bet no one will manage to solve it. : r/chess

Is there such a thing as a difficult mate in one? - Quora

What is the hardest mate-in-4 puzzle? - Quora

What is the hardest mate-in-4 puzzle? - Quora

Which is the greatest chess move ever played? - Quora

How to win chess in 4 moves as white - Quora

If in Chess a 'Checkmate' is better than 'Check', who wins the game if after the opposing player places you in Check, and your next move is Checkmate? After all, isn't the