Good game. Next time, be more mindful of your pawn structure.
Demolished by Computer 4- IMPOSSIBLE
Computer4 seems to like to throw different first moves out. Since it probably has an opening library and positional programming intact, that's a big advantage and the human can easily get into trouble early.
A pawn down and a weakness is probably a lost game against a computer. So at 11...0-0 a pawn down with an isolated pawn you were probably busted but you played well and didn't implode.
4. Na3 is a commital move and needs to be considered carefully. It's attacking post is b5 so hindering the Knights mobility with ...a6 or ...c6 is probably worth thinking about. 4.Na3 is also tempting ...Bxa3 weakening the Qside pawns but that gives up a lot of dark square control and probably not worth it.
5. Bf4 makes covering b5 necessary. Usually in QP openings ...Nc6 before...c5 isn't great as ...c5 is often needed for Black equality.
8.d4 now that the Black KB is gone, White plays for dark square control.
12.e3 White's program seems to know the key control square of an isolated pawn is the forward one.
16. Qxf6 cashes in on dark square strength producing another weakness.
Then the focus is on the isolated pawn going two pawns up with its fall.
You played well but 6. Nb5 probably made White much better.
Dear All!
I am a 1200+ rated player & very recently took on Computer 4- IMPOSSIBLE (1900 rated silicon monster).
I feel given the huge rating difference I played decent enough. Still I will welcome any suggestions & feedbacks to improve my game.