The Lion Variation, Forcing Line is a variation of the Philidor Defense, catalogued as ECO C41. The line runs 1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 5. Bc4 Be7 6. Ng5 O-O 7. Bxf7+ Rxf7 8. Ne6, reaching the position shown below after 15 half-moves.
Both sides have pawns in the centre (White on d4 and e4, Black on e5), and one pawn capture is available, so the structure has not settled yet. Development is level at three minor pieces each, and Black is up two points of material. It is Black to move after eight moves. Black has castled while White’s king is still uncommitted; Black has the bishop pair.
On the Philidor Defense generally: A solid but somewhat passive defense. Black supports e5 with d6 for a strong center.
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The Lion Variation, Forcing Line goes 1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 5. Bc4 Be7 6. Ng5 O-O 7. Bxf7+ Rxf7 8. Ne6. It is a variation of the Philidor Defense and is catalogued as ECO C41.
The Lion Variation, Forcing Line is ECO C41. ECO codes group openings by their move order, so nearby codes cover closely related lines of the Philidor Defense.
Stockfish evaluates the position after 1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 5. Bc4 Be7 6. Ng5 O-O 7. Bxf7+ Rxf7 8. Ne6 at -0.25 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 and e4, Black on e5), and one pawn capture is available, so the structure has not settled yet. Development is level at three minor pieces each, and Black is up two points of material. It is Black to move. Black has castled while White’s king is still uncommitted; Black has the bishop pair.