https://chessriddle.com/ It's from a student of Noël Studer's. Basically puzzles, but you can't see your moves on the board and have to commit to a line or variations before you see the result. Includes both positional (find a good improving move) and tactical puzzles (find a forcing line). It's 14-day free trial. Free tier gets you 7 puzzles a day. I liked it enough that I signed up for the yearly.
- https://chess-endgame-trainer.mooo.com/ - Free site - A very good program, for Endgame study. Lichess would do well, to incorporate this program into the Learn section. -:]
Lichess and chess.com
chessbase. Helps especially if you play OTB.
No mention of www.chessiverse.com?!
Site has over 1000 tuned bots - four of which can be played on LiChess - and everything else you would wish except of course playing humans, name it and it's there! Bots are benchmarked against LiChess' human ratings and cover the full range, 0 to 3300, four(?) are free to play without sub but really a sub is required albeit it's on the cheap side - about a third to a quarter of chessdotcom lowest sub.
Frankly I lost interest in playing anonymous players on LiChess and only play within my federation nowadays.
After six months I would still give the site five stars - over this period they have added lots of new features, like guided play, tournaments, GM opening database, AI game analysis and Insight like game library analysis. Worth every penny of the £8 a month sub, imo. Worth a peek.
Only niggle I have is that the Bots play too fast - more of a me problem I suspect.
PS: Really don't understand why this site is not better known. Keeping my fingers crossed you-know-who don't buy them out as it's a no contest if you're prepared to pay a small sub.
ChessABC. I’m not sure, cuz it’s been a while since I visited that site, so it might not be as great as it used to be.
Disclosure: I made this one, so weigh it accordingly.
I'm a tournament player and I built chessprep.org for my own OTB prep, because my ChessBase repertoires were stuck on one laptop. It's built around openings more than playing:
- Analysis: Stockfish in the browser (keeps working offline), plus an opening explorer with about 2.5 million over-the-board master games and recent tournament games.
- Openings: import your PGN or ChessBase files and drill the lines until you know them, or look up what an opponent plays before a round.
- Puzzles: 32,000 tactics from the Lichess open puzzle database.
What's free, so nobody has to find out after signing up: an account, Stockfish 16, PGN/ChessBase import, the explorer, training and 3 saved openings per side. Puzzles, Stockfish 18, unlimited openings and opponent prep are Premium, which is free during the beta, no card asked.
There's no playing against people, so it's an add-on to Lichess, not a replacement.