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Chess Opening Theory/1. e4/1...e5/2. Nf3/2...d6/3. d4/3...exd4/4. Nxd4

Exchange variation
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Position in Forsyth-Edwards Notation (FEN)
Moves: 1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4
Parent: Exchange variation

4. Nxd4

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White recaptures the pawn with the knight.

4...Nf6 is the main move, attacking the e4 pawn, and is answered with 5. Nc3 to defend it. To bring more pressure to it, Black must bring the rook to e1, which requires the manoeuvre ...Be7, ...O-O, ...Re1 and ...Bf8.

Both sides develop their pieces: Black usually avoids playing ...Nc6 until after they have played ...c5 (with tempo on White's knight) to avoid blocking it in. ...c5 weakens the d6 pawn so committing to it too early can be a mistake, e.g. 4...Nf6 5. Nc3 c5? 6. Bb5+ Bd7 (prevents Q from seeing d6) 7. Nf5 Nc6 8. Nxd6+ Bxd6 9. Qxd6±.

Theory table

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For explanation of theory tables, see theory table and for notation, see algebraic notation..

1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4

4 5 6 7 8 9
Exchange Variation

4. Nxd4

Nxd4
Nf6
Nc3
Be7
Bc4
O-O
O-O
Nxe4!
Nxe4
d5!
Bd3
dxe4
=
...
....
...
...
Bf4
O-O
Be2
Nc6
O-O
Re8
=
...
....
...
...
...
...
...
...
Qd2
Nxd4
Qxd4 +/=
...
....
...
...
...
...
...
Re8
Qd2
Nc6
O-O-O +/=
...
....
...
...
...
...
Qd2!
d5
Ndb5
Bb4
O-O-O +/=
...
....
...
...
...
...
...
Nc6
O-O-O
Nxd4
Qxd4 +/=
...
....
...
...
Be2
O-O
Bf4
Re8
Qd2 +/=
...
....
...
...
...
...
O-O
Re8
f4 +/=
...
....
...
...
...
...
...
...
Re1 +/=
...
....
...
...
g3
d5
e5
Ng4
Bg2
Nxe5
Qe2 +/=
...
....
...
...
...
O-O
Bg2
Re8
O-O +/=
...
....
...
...
...
...
...
...
...
O-O
O-O +/=
...
....
...
...
...
O-O
Bg2
Re8
O-O
Bf8
h3 +/=
...
Nc6
=
...
c5
Nf3
Nc6
Nc3
Be7
Bf4!
Nf6
Qd2
Be6
Ng5! +/=

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References

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See also

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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: