This is literally a reversed KingsIndian. 9...dxe4 shouldn't have been too terrifying for white, but he didn't seem to have much clue of a plan in resulting pawn structure. Looking quickly I don't either. Nc4-e3 aiming to use fact don't have pawn defending d5 seemed resonable. Software's Bf1-Bc4/b5 seems strange. Will look up a Tal game, with this pawn structure from his best games book. Donner v Tal was game thinking about https://www.chessgames.com/perl/chessgame?gid=1139532
Positional Old Indian Defense victory
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I couldn't really decide what to name this post. In the last round of this tournament, I faced a player who I had played many times before with mixed results, but who I'd never beaten with black. This game was mostly positional, except for where my opponent blundered in the middlegame.
Anyways, I felt pretty good about this win because I didn't play carelessly after I established a winning position, something that has been a fatal flaw of mine. I was focused from the beginning to the end and I think that white could have drawn this if I played my endgame as badly as I have done in the past.