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Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nf6/3. Nc3

Petrov's Defence: Three Knights Game
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Position in Forsyth-Edwards Notation (FEN)
Moves: 1. e4 e5 2. Nf3 Nf6 3. Nc3

Petrov's Defence: Three Knights Game

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3.Nc3

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Black's most common response to this move is 3...Nc6, which transposes into the Four Knights Game. However, Black can also play 3...Bb4.

Theory table

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.

1. e4 e5 2. Nf3 Nf6 3.Nc3

3
Four Knights ...
Nc6
Bb5
 
(to 2...Nc6 3.Nc3 Nf6)
Petrov Defense ...
Bb4
Nxe5
 

References

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v · t · e
Chess Opening Theory
1. e4 e5
Open games
3. Bb5
Spanish
3. Bc4
Italian
3. Nc3 Nf6
Four knights
Other
2...Nf6
Russian
2...d6
Philidor
Other
2. f4
King's gambit
2. Nc3
Vienna
Other
1. e4 c5
Sicilian
1. e4 e6
French
1. e4 c6
Caro-Kann
1. e4 other
1. d4 d5
Closed games
1. d4 Nf6
Indian
1. d4 f5
Dutch
1. d4 ...other:
Flank
Unorthodox