Chessboard Vision play online

Chessboard Vision helps you develop blindfold chess skills.
Try to picture the chessboard in your mind and guess the color of the square asked.
There are two different game modes:
-Standard mode: Guess the correct square color. Every error you make costs you a life, 3 errors means game over!
-Time pressure: Same as the standard mode, but you have only one minute to score as much as you can!