# Chess Opening Theory/1. e4/1...e5

Open Game
 a b c d e f g h 8 8 7 7 6 6 5 5 4 4 3 3 2 2 1 1 a b c d e f g h
Position in Forsyth-Edwards Notation(FEN)

rnbqkbnr/pppp1ppp/8/4p3/4P3/8/PPPP1PPP/RNBQKBNR

Moves: 1. e4 e5
ECO code: C20-C99
Parent: King's Pawn Opening

# Open Game

### 1...e5

Black plays the classical response to 1. e4. By mirroring White's move Black has guaranteed himself an equal share of the centre and scope to develop his pieces. 1...e5 is one of the few moves that directly interferes with White's plan of playing d4. But the move's merit is also its drawback; with the position once again symmetrical, White to move has the initiative and sooner or later will be able to break the symmetry to his own advantage. The pawn on e5 is undefended and it is easy for White to develop in a way that restricts Black's possible responses, by simply threatening to capture it. Though the move is still common at every level, it has seen a modest decline in popularity during the 20th century.

The classical move for White is

threatening Black's undefended pawn while developing one of his Kingside pieces in preparation for castling.

Another plan is to open the f-file for an attack on Black's weak f7 point, an idea which underlies a trio of related moves the variations of which frequently transpose into each other:

Or, White can thumb his nose at Black's e-pawn, and smash the centre open with

• 2. d4 in order to develop his pieces with great speed, sacrificing a pawn or two if necessary.

Other less common moves:

### Statistics

Estimated next move popularity:Nf3 81%, f4 6%, Nc3 6%, Bc4 4%, d4 2% all others less than 0.5%

## Theory table

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

1. e4 e5

2 3 4 5 6 7
Ruy Lopez Nf3
Nc6
Bb5
a6
Ba4
Nf6
O-O
Be7
Re1
b5
Bb3
d6
=
King's Gambit f4
exf4
Nf3
g5
h4
g4
Ne5
Nf6
Bc4
d5
exd5
Bd6
=
Vienna Game Nc3
Nf6
f4
d5
fxe5
Nxe4
Nf3
Be7
d4
Bb4
Bd2
Bg4
=
Bishops Opening Bc4
Nf6
d4
exd4
Nf3
Bb4+
c3
dxc3
bxc3
Bc5
e5
d5
=
Center Game d4
exd4
Qxd4
Nc6
Qe3
Nf6
Nc3
Bb4
Bd2
O-O
O-O-O
Re8
=
Parham Attack Qh5
Nc6
Bc4
g6
Qf3
Nf6
Ne2
Bg7
Nbc3
d6

=