The Classical Attack, Berger Variation is a variation of the Petrov's Defense, catalogued as ECO C42. The line runs 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 8. Re1 Bg4 9. c3 f5 10. Nbd2, reaching the position shown below after 19 half-moves.
Both sides have pawns in the centre (White on d4, Black on d5). Development is level at three minor pieces each. It is Black to move after ten moves. White has castled while Black’s king is still uncommitted; the e-file file is fully open.
On the Petrov's Defense generally: A symmetrical defense known for its solidity. Black mirrors White's moves in the opening.
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The Classical Attack, Berger Variation goes 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 8. Re1 Bg4 9. c3 f5 10. Nbd2. It is a variation of the Petrov's Defense and is catalogued as ECO C42.
The Classical Attack, Berger Variation is ECO C42. ECO codes group openings by their move order, so nearby codes cover closely related lines of the Petrov's Defense.
Stockfish evaluates the position after 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 8. Re1 Bg4 9. c3 f5 10. Nbd2 at +0.16 at depth 18, which is balanced. Engine evaluation is only a starting point — at club level the practical value of a line is mostly about whether you know its plans better than your opponent does.
Both sides have pawns in the centre (White on d4, Black on d5). Development is level at three minor pieces each. It is Black to move. White has castled while Black’s king is still uncommitted; the e-file file is fully open.