Chess Opening Theory/1. e4/1...g6/2. d4/2...Bg7/3. Nc3

Modern Defence, Main Line
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)
Moves: 1. e4 g6 2. d4 Bg7 3. Nc3

Modern Defence, Main LineEdit

This the main line of the Modern Defence. Here Black has allowed White to have a classical pawn duo on e4 and d4. Black must have a plan to attack back or they will be steamrolled.

The most common reply is 3...d6. Here Black attempts to undermine the center through a hypermodern approach.

A more passive approach is 3...c6.

Theory tableEdit

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

1. e4 g6 2. d4 Bg7 3. Nc3

3 4


Nf3 =