The computer analysis, as powerful as it seems can often miscalculate. At one point in an analyzed game it told me to take an insuing rook with my queen, but actually doing so would get it trapped. The computer is not always 100% right, but usually reliable.
As for your AI you can use a software that allows you to play a chess game from any position no, I'm not advertising, I just wanted to help. Here's the link
In the computer analysis, the ai said I should have castled which seems to me like a disaster as I would have surely lost my rook with multiple threats along my kingside. Sometimes I do not understand why some moves are being suggested.