About this opening
Philidor Defense: Nimzowitsch, Larobok Variation is an opening in the Encyclopedia of Chess Openings,
classified under code C41. ECO group C (C00–C99)
covers open games (1.e4 e5) and the French Defence, including the Ruy Lopez, Italian, Scotch and King's Gambit. This particular variation is reached
after 13 half-moves from the
starting position, with the move sequence 1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 5. Bc4 Be7 6. Ng5 O-O 7. Bxf7+.
It belongs to the Philidor Defense family. Within that family this is a level-2 branch (the Nimzowitsch → Larobok Variation line).
The opening sequence in prose form: 1.e4 e5, 2.Nf3 d6, 3.d4 Nf6, 4.Nc3 Nbd7, 5.Bc4 Be7, 6.Ng5 O-O. From this position the encyclopaedia records no further canonical continuations — practical play branches into unnamed transpositions or returns to the parent line for alternative ideas.