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Chess Opening Theory/1. d4/1...d5/2. c4/2...c6/3. cxd5/3...cxd5/4. Nc3

Slav defence
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Position in Forsyth-Edwards Notation (FEN)
Moves: 1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3
ECO code: D10
Parent: Exchange variation

4. Nc3

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White doesn't reveal their intentions yet and simply develops the knight to its most natural square, putting pressure on d5.

Black's main response is 4...Nf6, overprotecting the d5 pawn and developing the kingside.

Black can also play 4...Nc6, often transposing to the same lines as 4...Nf6. However, this move does give White additional options. One of those options being 5. e4, which would have been prevented by 4...Nf6, transposing into a position resembling the French defence.

Theory table

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1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3

4 5 6
...
Nf6
Bf4
Nc6
e3
a6
=
...
...
Nf3
Nc6
Bf4
Bf5
=
Boor attack ...
...
f3
Nc6
e4
dxe4
=

References

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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: