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Chess Opening Theory/1. e4/1...e5/2. Qh5/2...Nc6/3. Bc4/3...g6/4. Qf3/4...f5

Frederiksberg Variation
a
b
c
d
e
f
g
h
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
a
b
c
d
e
f
g
h

Position in Forsyth-Edwards Notation (FEN)
Moves: 1. e4 e5 2. Qh5 Nc6 3. Bc4 g6 4. Qf3 f5

Frederiksberg Variation

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4...f5

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Black 'sacrifices' the f5 pawn, although it can't actually be taken, because of 5...Nd4. White's queen is stuck in the center and is a target for Black's knights, bishops and pawns. Black can sometimes play f4, with the idea of moving the d pawn, Nf6, and then Bg4, trapping the queen.

White will have to play very carefully to not end up dead lost.

Theory table

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.

1. e4 e5 2. Qh5 Nc6 3. Bc4 g6 4. Qf3 f5

5 6 7 8
Ne2
Nf6
Nc3
d6
exf5
Bxf5
d3
Bg4
=
exf5?
Nd4
Qd5
Qe7
Na3
c6
-+
exf5?
Nd4
Qd1
Qg5
g3
Qxf5
-+