Yes: https://www.chessvariants.com/alphabet.html https://www.chessvariants.com/alphabet.html My point not being that that is a link straight to the exact thing

Yes: https://www.chessvariants.com/alphabet.html https://www.chessvariants.com/alphabet.html My point not being that that is a link straight to the exact thing you've described, but that if you ask that site for all the variants it has with a blank search [1], the first 500 variants on file (give or take some administrative garbage) gets you the variants starting with a number and up to "Avalanche Chess" alphabetically... that is, you can't even get all the way through the As before the search bails out. [1]: https://www.chessvariants.com/index/mainquery.php https://www.chessvariants.com/index/mainquery.php