Geometry of the Chessboard: Reti Endgame Puzzle
It is white to move. It looks impossible to achieve a draw here. Black's pawn is way out of the white's king's range. It seems white has to either try to queen his c pawn, which looks impossible or chase down black's h pawn, which also looks impossible.
White to move and draw. Hint: Use the geometry of the chessboard to move two directions at the same time!