Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bc4/3...Nf6/4. d4/4...exd4/5. O-O

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< Chess Opening Theory‎ | 1. e4‎ | 1...e5‎ | 2. Nf3‎ | 2...Nc6‎ | 3. Bc4‎ | 3...Nf6‎ | 4. d4‎ | 4...exd4
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Two Knights Defence:Classical Variation
a b c d e f g h
8 a8 b8 c8 d8 e8 f8 g8 h8 8
7 a7 b7 c7 d7 e7 f7 g7 h7 7
6 a6 b6 c6 d6 e6 f6 g6 h6 6
5 a5 b5 c5 d5 e5 f5 g5 h5 5
4 a4 b4 c4 d4 e4 f4 g4 h4 4
3 a3 b3 c3 d3 e3 f3 g3 h3 3
2 a2 b2 c2 d2 e2 f2 g2 h2 2
1 a1 b1 c1 d1 e1 f1 g1 h1 1
a b c d e f g h
Position in Forsyth-Edwards Notation(FEN)

r1bqkb1r/pppp1ppp/2n2n2/8/2BpP3/5N2/PPP2PPP/RNBQ1RK1

Two Knights Defence:Classical Variation[edit]

5. O-O[edit]

The classical variation. Castling both gives the White King some security and activates the rook to be able to come to e1 which has much potential to support the White e-pawn or pin any pieces that take the e-pawn. Black's possible sensible replies are:

  • 5....Nxe4
  • 5....Bc5
  • 5....d6
  • 5....Be7


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Theory table[edit]

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

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4.d4 exd4

5

6

7

8

9

10
1 O-O
Nxe4
Re1
d5
Bxd5
Qxd5
Nc3
Qh5
Nxe4
Be6
Bg5
Bd6
2 ...
Bc5
e5
d5
exf6
dxc4
Re1+
Be6
Ng5
Qd5
Nc3
Qf5
3 ...
d6
Nxd4
Be7
Nc3
O-O
Re1
Bd7
f4
Nxd4
Qxd4
c6
+/=
4 ...
Be7
Nxd4
d6




Transposes to above line

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References[edit]