[#]
1.d4
d5
2.c4
c6
3.Nc3
Nf6
4.e3
e6
5.Nf3
Bd6
6.Bd3
O-O
7.O-O
Ne4
The first mistake. It loses a pawn. Look at the better move:
[7...Nbd7
Black has two plans. Basically Black wants to play e7-e5. But first play dxc4.. although it's not required. The other plan is to play a more patient b6, Bb7, and eventually dxc4. 8.Qc2
dxc4
9.Bxc4
e5
Is a good example of what Black usually does.]
8.Nxe4
dxe4
9.Bxe4
Nd7
10.Qc2
[10.Bc2
Is what I would play. White has ideas of Qd3, but also the simple e3-e4, then maybe e4-e5!]
10...c5?
11.d5
A decent move, but overlooking the "easy" Bxh7+.
[11.Bxh7
Kh8
12.Bd3
A "hit and run.]
11...exd5
12.cxd5
Nf6
13.Rd1
Nxe4
14.Qxe4
Re8
15.Qc4
Bf5
A good move. Black has two Bishops and fast development for the pawn. 16.Re1
Probably a mistake.
[16.Nd2
With the idea of e3-e4 is a reasonable alternative.]
16...Be4
17.Nd2
Qg5
The biggest mistake, and also it overlooks a powerful tactic.
[17...Bxd5
! Wins a pawn (or more). 18.Qxd5
Bxh2
19.Kxh2
Qxd5
]
18.Nxe4
Qe5
19.Nxd6
Qxd6
20.e4
White went on to win
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