Chess Endgame Training webapp updated

After over four years of inactivity on the project, I've just released a new beta of my open-source web app for practicing chess endgames: chess-endgame-trainer.web.app

I've added some of the most requested features:

- Save configurations and progress to avoid losing them (to Google Drive)
- When reaching a trivial position, it doesn't force you to solve it manually (it prompts you to resolve those last moves automatically without penalizing you for it).
- Updated to Stockfish 16 NNUE (linrock with the 7MB nnue file)
- Parameterize Stockfish by depth and time
- Better use of Syzygy/Stockfish
- List of moves
- Allows you to select a move and continue another line from there
- Manual mode: to move opponent's pieces to explore lines not suggested by syzygy or Stockfish: "what if...?"
- Uses the chessground board which allows you to draw circles and arrows
- Board image capture
- Copy FEN and PGN to clipboard
- Button to open position analysis on Lichess
- Cosmetic improvements

At the moment I'm not going to update the Android App, but the Webapp is PWA hence installable and able to work offline.

I hope you enjoy it!

I've been practicing endgames on your website for a long time and it is absolutely brilliant !! Thank you for sharing this awesome project with us and keep up the good work !

#2 Thank you very much for your kind words.

I have been recommending your site for endgame study for many years. Nice to meet someone involved with it. I've always thought that Lichess should include it, as one of its practice learning tools. Thanks for the update. - :] @supertorpe

@Skittle-Head It's great to meet someone who is such a dedicated advocate of the app! I have some plans to improve it even further (i.e. create an online repository -github gist- where we could import endgame databases provided by users.), but it'll have to wait to the summer.

Wow! Suddenly my mindless forum lurking paid off.
You created a brilliant learning resource. Many thanks!

@supertorpe Hey love your site and also have been using it for a while! However it just started not working on Desktop Chrome, I just get a spinning rook logo and the site never loads. Disabling adblock didn't help. Any ideas?
Cheers

@etium I've just uploaded an update a few minutes ago. Try refreshing... If It still does not work, open an issue and/or send me the output of the console.

Thanks a lot for this brillant site. It is really a great help for improving endgame skills

@etium I've published a new beta that fallbacks to another stockfish version when SIMD is not available. I've tested it in a virtual machine with some combinations of CPUs (coreduo, core2duo, atom N270), ubuntu 18 and firefox 79, and works ok.
Let me know if that has solved the problem for your environment.

Edit: it won't work with a pentium 2/3 (no native wasm support)