The Blumenfeld Attack is a variation of the Scotch Game, catalogued as ECO C45. The line runs 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. Nb5, reaching the position shown below after 11 half-moves.
White holds the centre with pawns on e4. Development is level at two minor pieces each. It is Black to move after six moves.
On the Scotch Game generally: An open game where White immediately challenges Black's center. Leads to active piece play.
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The Blumenfeld Attack goes 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. Nb5. It is a variation of the Scotch Game and is catalogued as ECO C45.
The Blumenfeld Attack is ECO C45. ECO codes group openings by their move order, so nearby codes cover closely related lines of the Scotch Game.
Stockfish evaluates the position after 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. Nb5 at -0.61 at depth 18, which is a small but real edge for Black. 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.
White holds the centre with pawns on e4. Development is level at two minor pieces each. It is Black to move.