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Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nf6/3. Nxe5/3...d6/4. Nf3/4...Nxe4/5. Nc3

Petrov's Defence
a
b
c
d
e
f
g
h
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
a
b
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d
e
f
g
h

Position in Forsyth-Edwards Notation (FEN)
Moves: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3

5. Nc3

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This is the Nimzowitch Attack of the Petrov's defense, often played if White wants to imbalance the position in the otherwise dull and symmetrical Petrov.

Usually Black takes the knight on c3 with 5...Nxc3, to compromises the White pawn structure, though if Black insists on keeping symmetry, he may also retreat the knight with 5...Nf6 instead.

Theory table

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5 6 7
...

Nxc3

dxc3

Be7

Be3

O-O

=
...

Nf6

d4

d5

Bd3

Bd6

+/=

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v · t · e
Chess Opening Theory
1. e4 e5
Open game
2. Nf3
With 2...Nc6:
  • Four knights ( )
  • Italian game ( )
  • Spanish game ( )

With other 2nd moves:

2. Other
1. e4 c5
Sicilian defence
1. e4 ...other: