Scandinavian Defense: Anderssen Counterattack

An entry in the Encyclopedia of Chess Openings (ECO B01), reached after 8 half-moves: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 e5.

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5.Nf3 2 lines
- B01 Collijn Variation
- B01 Goteborg System
5.dxe5 1 line
- B01 Orthodox Attack

About this opening

Scandinavian Defense: Anderssen Counterattack is an opening in the Encyclopedia of Chess Openings, classified under code B01. 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 8 half-moves from the starting position, with the move sequence 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 e5.

It belongs to the Scandinavian Defense family. Within that family this is a sub-variation (the Anderssen Counterattack line).

The opening sequence in prose form: 1.e4 d5, 2.exd5 Qxd5, 3.Nc3 Qa5, 4.d4 e5. From this position 2 named continuations are recorded in the encyclopaedia, each leading to a distinct theoretical line.