Only after downloading 11 GB of game, playing for a few minutes and uninstalling it in frustration, then searching the web, did I understand Chess Ultra is a Switch game designed to work in VR. For a PC game, though, where I was playing it, it was a slow bloatware that lead to a 404 page when you wanted to switch the chess board style.
Imagine coming from Lichess and trying to make sense of something that requires so much space to function, has only 3D pieces and uses all of your video card to display a chessboard and some coffee on a table. It was unbearable. Perhaps it would work on a Switch console, with VR glasses, if you want to enter the mood of playing over the board in a smoky chess room, but I have no idea who would want that.
And then I looked on the Internet to see what other people were saying and everything was great! Oh, the multiple options, the varied puzzles, the recreations of classical games. Jesus, that's basic chess web site functionality! And "critic ratings" are 85% while the normal people rate it at about 60%. Really? Am I crazy for thinking it's a badly constructed game? I hated it.