Chess Light

Chess Light: a pleasing game that more closely resembles Quell Memento than actual chess.  I completed the 95 levels below "Master" pretty quickly, but the later levels are difficult enough to be interesting.  Perhaps the game aids chess visualization, or perhaps not.  But it is worth checking out in any case.

I will also mention other chess-derivative puzzle games that I have not tried:

• KnightVision
  
• Solitaire Chess 
  
• Chess Defense 
  
• Legend of Chess