1 e4 c6 2 d4 d5 3 exd5 cxd5 4 c4 Nf6 5 Nc3 e6 6 Nf3 Bb4
I wasn't quite sure whether I should play this or not, but I listened to my instincts.
7 Bg5!? 0-0
This looks sensible, but it may not be the best move.
8 Bd3 Nc6 9 0-0 Be7
By playing ...Bb4-e7, Black has effectively lost a tempo.10 Re1 Nb4 11 Bf1 b6 12 Ne5!?
I think a better alternative was 12 a3! Nc6 13 Bxf6 Bxf6 14 cxd5 exd5 15 h3, when the move ...b7-b6 doesn't make sense since the bishop is better placed on e6 rather than on b7.
12...Bb7 13 Rc1 dxc4 14 Bxc4 Nbd5
Avoiding tactics like Ne5xf7. For example. 14...Rc8?! 15 Nxf7! Rxf7 16 Bxe6 and White gets 2 pawns and a rook for 2 pieces.
15 f3!?
This is an interesting idea, but not very popular in these type of positions. You'll see why he played it later on.
15...a6 16 Bd3 b5 17 Bb1 Qb6 18 Nxd5 Bxd5 19 Ng4!
This is the reason behind f2-f3.
19...Rfd8 20 Qd3 Kf8!
Even though I have to give up a pawn, my king will be quite safe in the centre behind the wall of pawns. I can also put my rooks on h8 and g8 to put pressure on the kingside.
21 Nxf6 Bxf6 22 Bxf6 gxf6 23 Rc5 Ke7 24 Qxh7 Bc6 25 Rec1?
Clearly better was 25 Qh4!, for example 25...Rd6 26 b4 a5 27 Qf2 axb4 28 Be4 Rad8 29 Bxc6 Rxc6 30 Rxc6 Qxc6, with an equal position.
25...Rxd4! 26 Kh1??
And now the weakness of the back rank decides the game.
26...Qxc5! 0-1