For tactics I've never seen anything better than chess tempo [0], which is free, or for a small yearly subscription you can absolutely go nuts breaking down tac

For tactics I've never seen anything better than chess tempo [0], which is free, or for a small yearly subscription you can absolutely go nuts breaking down tactical themes and combinations of themes, and the tracking is very good. I did several thousand tactics puzzles there and it helped quite a bit. For books, Beginners Mind by Jeremy Silman is pretty good, as is his endgame book. Logical Chess by Cherenev is also a great introduction to how skilled people think about games but takes a different approach than Silman. [0] - http://chesstempo.com/ http://chesstempo.com/