Probably the best online flash chess game at the moment, Spark Chess offers 4 levels of difficulty and knows how to adapt to both novices and more experienced players. You'll have the choice to face Cody the beginner, Claire the casual, Boris the club player or finally Guru the Grandmaster. Spark Chess also offers the ability to save your game and choose the language. In addition, the 3D interface is particularly clear, functional and elegant. In a nutshell, here's a great game to practice chess against the computer.