Use your keyboard to play chess
Move pieces faster using your keyboard on Lichess.
It is a legal way to become faster in ultrabullet.
You can try it here: https://ultrabullet.com/ultratraining
To try it, go to Lichess.org and create a game against Stockfish ("Play with the computer"). To make a move, hover your cursor over the destination square ("e4" for white and "e5" for black) [don't press the mouse button] and click the corresponding key ("w").
A video example: https://youtu.be/UAExpNbLlIo
Many thanks to Vempele, the author of the first keyboard app, from which I took some ideas and parts of the code: https://gist.github.com/Vempele/46333e85e33b6d488c3ffb131942272d
(That script needs to be updated after LichessV2, so you can write me a message on Lichess: "BerserkAsIfUWereMad", if you want to try it out).
The forum discussion: https://lichess.org/forum/lichess-feedback/feature-request-using-keyboard-for-selecting-pieces?page=1
Source code: https://github.com/Sentero-esp12/Lichess-Keyboard-Input