Chess.com is the largest online chess community. Its Play Computer feature offers 25 difficulty levels and many themed bots. (One forum user notes “you can still play vs computer as always… and you can now play against some newly created personality bots”.) Beginners can select easy levels, while advanced players can challenge GM-level engines. Most basic features are free (with ads), and paid Gold/Platinum/Diamond memberships unlock extra bots and lessons. Besides AI play, Chess.com provides extensive training: thousands of puzzles, interactive lessons, and a post-game analysis board.