I have a suggestion about extendinig the puzzles to include puzzles where the best move is the only move that saves the position to draw in an otherwise hopeless position.
Also it shouldn't be mentioned is it's a draw puzzle or a win puzzle to make it a challenge for the user to decide if the best is to go for a draw or a win.
Also it shouldn't be mentioned is it's a draw puzzle or a win puzzle to make it a challenge for the user to decide if the best is to go for a draw or a win.