There was a time that vertical castling was allowed by a strict reading of the rules of chess.
See Offbeat interpretations of the rules of chess on Wikipedia.
king and rook need to have not moved yet in the game of chess for castling to be allowed, can you spot the mat in 2?
made on @chess
Funny chess meme chess puzzle and chess problems, checkmate puzzle.
Eric rosen vs agadmator tournament with hikaru and magnus carlsen.