Where did I mess up?

I'm rated in chessmaster at between 600-700, I have beaten 1000 "computer" personalities in chessmaster. I got cocky, but thought i was doing ok against this 1200 rated computer "personality"


[Event "Chessmaster 10th Edition Rated Game"]
[Site ""]
[Date "2007.2.2"]
[Round ""]
[White "ME"]
[Black "player 2"]
[TimeControl "1800"]
[Result "0-1"]
[ECO "oft "]

1.e4 b6 2.d4 Bb7 3.Nc3 e6 4.Nf3 Bb4 5.Qd2 a6 6.Bd3 Nc6 7.O-O Nf6 8.Qe3 Bxc3 9.bxc3 Qc8 10.g3 h6 11.Ba3 d6 12.Bc4 Rb8 13.Qf4 Nh5
14.Qg4 g6 15.d5 Na5 16.Bd3 e5 17.Qh4 Qd8 18.Qxd8+ Rxd8 19.Bb4 O-O 20.c4 f5 21.c3 fxe4 22.Bxe4 Nxc4 23.Bd3 Bxd5 24.Bxc4 Bxc4
25.Rfe1 Rxf3 26.Rad1 Rdf8 27.Kg2 Rxf2+ 28.Kh1 Rxa2 29.Rf1 Bd5+ 30.Rf3 Bxf3+ 31.Kg1 Be4 32.Rf1 Rg2+ 33.Kh1 Rxf1# 0-1

Hey man, let's take a look

20...f5 he offered you his g pawn on his king side, popping the kings position wide open to attack, yet you didn't take on f5? Always remember that when you can trade your pawns for the pawns protecting his king it's a good trade. 21. exf5 is much preferred, removing his g6 pawn from its protecting square.

Because of not taking on 20 you lost 3 pawns! and you hung a knight! So that is where it all went wrong.

26.... Rf8, you always gotta watch out for two rooks on the same lines, they can be deadly. Much better than 27. Kg2 is 27. Rd2 defending the f2 square twice.

Basically you made no bad moves, you just simply didn't respond well to his threats... if that makes any sense. I think your problems were in your defense.

Anyways it looks like a 1300 player towards the end so don't get upset,
just take your time with your moves and they'll be much prettier 🙂