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

Can a knight checkmate on its own? - Quora

Extremely hard mate in one exercise - Chess - Quora

Can every 'black to move' chess puzzle be altered to an equivalent 'white to move' puzzle? If not, what are some exceptions? - Quora

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

What is a known position in chess where both players can checkmate each other simultaneously on their turns? If so, how does it play out? - Quora

What are some of the toughest chess puzzles? - Quora

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

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

What is your favorite chess puzzle? - Quora