Play a friend or practice
Start a game in the browser, in 2D or 3D, without installing anything.
A game worth coming back to
Most people who enjoy chess do not want a training regimen. They want a board that is ready when they are, an opponent, and some sense of why a game went the way it did. ChessReign is built around those three things rather than around ranking.
The board runs in 2D or 3D, puzzles are drawn from a library of 1,600 positions, and finished games stay in your history so a move you were unsure about is still there to look at later.