Nimzowitsch Defense: Scandinavian Variation, Exchange Variation

An entry in the Encyclopedia of Chess Openings (ECO B00), reached after 6 half-moves: 1. e4 Nc6 2. d4 d5 3. exd5 Qxd5.

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4.Nc3 1 line
- B00 Marshall Gambit

About this opening

Nimzowitsch Defense: Scandinavian Variation, Exchange Variation 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. d4 d5 3. exd5 Qxd5.

It belongs to the Nimzowitsch Defense family. Within that family this is a level-2 branch (the Scandinavian Variation → Exchange Variation line). The immediate parent line is Nimzowitsch Defense: Scandinavian Variation, transitioned via 3…Qxd5.

The opening sequence in prose form: 1.e4 Nc6, 2.d4 d5, 3.exd5 Qxd5. From this position exactly one named continuation is recorded in the encyclopaedia.