King's Knight Opening
abcdefgh
8
a8 black rook
b8 black knight
c8 black bishop
d8 black queen
e8 black king
f8 black bishop
g8 black knight
h8 black rook
a7 black pawn
b7 black pawn
c7 black pawn
d7 black pawn
f7 black pawn
g7 black pawn
h7 black pawn
e5 black pawn
e4 white pawn
f3 white knight
a2 white pawn
b2 white pawn
c2 white pawn
d2 white pawn
f2 white pawn
g2 white pawn
h2 white pawn
a1 white rook
b1 white knight
c1 white bishop
d1 white queen
e1 white king
f1 white bishop
h1 white rook
8
77
66
55
44
33
22
11
abcdefgh
Moves1.e4 e5 2.Nf3
ECOC40 (–C99)
ParentOpen Game

The King's Knight Opening is a chess opening consisting of the moves:

1. e4 e5
2. Nf3

White's second move attacks the e-pawn. Black usually defends this with 2...Nc6, which leads to several named openings. Of the alternatives, the most important are Petrov's Defense (2...Nf6) and Philidor's Defense (2...d6).

Main line: 2...Nc6

Most games (more than 80%) continue with 2...Nc6.

Some moves from here include:

Other Black defenses

Of the alternatives, 2...Nf6 (Petrov's Defense) is considered fully respectable and is common in grandmaster games. Philidor's Defense is playable but is seen more rarely.

Less common defenses

A number of less popular continuations are possible. These openings are generally considered to be less sound than those mentioned above. These openings are all categorized in the ECO under code C40.

References

    • Batsford Chess Openings 2 (1989, 1994). Garry Kasparov, Raymond Keene. ISBN 0-8050-3409-9.
    The Wikibook Chess Opening Theory has a page on the topic of: 1. e4/1...e5/2. Nf3
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