I briefly checked Ultra Chess since it was to be had as a steal in recent Steam sales. Visually glorious in 2D, the promised VR implementation was terrible (absolutely blurry, the blurriest mess I have ever seen in any VR), and the chess engine was an imposition even at highest level, that weak it played, making often total nonsense moves and knowing nothing about anything. It moved pieces around in compliance with the rules, that was all.
The title is by a developer whose earlier chess software I already knew from PS4. There too it looked superb, and played terrible. The developer also made a decent pool game, once again stunning visuals, but the AI left to be desired although it provides the player with an opponent, the title is okay. Only in Snooker the AI sucks, I enjoyed the AI in Virtual Pool 4's Snooker part much more.
Stunning 2D looks, broken VR promise, terrible chess competence is what Ultra Chess is about. After 20 minutes and two matches at a medium and the maximum difficulty level: refunded.
I did not notice a big difference between both levels, btw.