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

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

How to win chess in 4 moves as white - Quora

Easy puzzle for beginners (Soviet Chess Primer): White to move and win : r/chess

What are some of the toughest chess puzzles? - Quora

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

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

Can a player pass a turn in a game of chess? Why? - 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

What is the best chess problem that you have ever seen? - Quora