I have just updated the AI to be a little more challenging.
It now has extra capacity for calculating which move sequences will checkmate the player.
Good luck!
Version 1.2.9 - AI Update
Source: Steam Community (opens in a new tab)
Build and release context
Steam update times within 24 hours of this post. Matching dates do not confirm which build it describes.
Build 6659474 · public branch
Steam updated · First observed