Board and pieces
Normal: Extra space for comments and shorter displays.
Large: Maximize board size on taller displays.
Show numbered coordinates on the board squares. (Recommended)
Show chess style coordinates around the board's border.
Show a perspective effect to make the board look 3d.
Delay per move(ms)
Difficulty (Only effective if you've signed in.)
Quick: Problems will be easy but not trivial. You'll get roughly 5/6 correct.
Easy: Problems will be below your rating. You'll get roughly 3/4 correct.
Normal: Most problems will be slightly below your rating. You'll get roughly 2/3 correct.
Hard: Problems will be about your rating. You'll get roughly 1/2 correct.
Tough: Most problem will be slightly above your rating. You'll get roughly 1/3 correct.
Brutal: Problems will be above your rating. You'll get roughly 1/4 correct.
Play from the top to practice seeing your opponent's threats.
Play from the bottom to practice seeing your opportunities.
Use green and red to show success and failure. (Default)
Use blue and yellow to show success and failure.
Board drag and drop interface:
Enable quick move for pieces and squares with only one legal move.
Auto-detect and use the touch screen.
Force the board to use mouse events (useful on laptops with touch screens).