The Max Lange Attack is a variation of the Two Knights Defense, catalogued as ECO C56. The line runs 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Bc5 6. e5, reaching the position shown below after 11 half-moves.
Both sides have pawns in the centre (White on e5, Black on d4). Development is level at two minor pieces each, and Black is up a pawn of material. It is Black to move after six moves. White has castled while Black’s king is still uncommitted; Black has doubled pawns on the d-file.
On the Two Knights Defense generally: Black counters 3.Bc4 with Nf6, challenging the e4 pawn immediately. Leads to sharp, tactical play especially after 4.Ng5.
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The Max Lange Attack goes 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Bc5 6. e5. It is a variation of the Two Knights Defense and is catalogued as ECO C56.
The Max Lange Attack is ECO C56. ECO codes group openings by their move order, so nearby codes cover closely related lines of the Two Knights Defense.
Stockfish evaluates the position after 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Bc5 6. e5 at +0.51 at depth 18, which is a slight pull for White, within normal opening margins. 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 e5, Black on d4). Development is level at two minor pieces each, and Black is up a pawn of material. It is Black to move. White has castled while Black’s king is still uncommitted; Black has doubled pawns on the d-file.