Nimzowitsch Defense: El Columpio Defense

An entry in the Encyclopedia of Chess Openings (ECO B00), reached after 6 half-moves: 1. e4 Nc6 2. Nf3 Nf6 3. e5 Ng4.

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4.d4 3 lines

About this opening

Nimzowitsch Defense: El Columpio Defense is an opening in the Encyclopedia of Chess Openings, classified under code B00. ECO group B (B00–B99) covers semi-open games (1.e4 with Black playing anything other than 1…e5), with the Sicilian, French, Caro-Kann and Pirc/Modern at its heart. This particular variation is reached after 6 half-moves from the starting position, with the move sequence 1. e4 Nc6 2. Nf3 Nf6 3. e5 Ng4.

It belongs to the Nimzowitsch Defense family. Within that family this is a sub-variation (the El Columpio Defense line).

The opening sequence in prose form: 1.e4 Nc6, 2.Nf3 Nf6, 3.e5 Ng4. From this position exactly one named continuation is recorded in the encyclopaedia.