A45

Trompowsky Attack

10 named lines in this family, ECO A45. Every one of them opens 1. d4 Nf6 2. Bg5, so the notes on those moves are written once, just below, instead of once per line. Under each line you get its moves and the sentences it adds that this page has not already printed. A line's own page carries up to its first 4 per-move notes in full.

The moves every line here plays

1. d4 Nf6 2. Bg5

1. d4 Stakes a claim in the centre, controlling e5, and frees the bishop and queen.
1... Nf6 Develops the knight to f6, eyeing d5 and e4.
2. Bg5 Develops the bishop with tempo - it attacks the knight on f6. Theory calls this the Trompowsky Attack.

Main lineA45

1. d4 Nf6 2. Bg5

Bg5 on move two threatens to double the f-pawns and drags the game off known paths immediately - a practical weapon that trades theory for fresh positions.

Classical DefenseA45

1. d4 Nf6 2. Bg5 e6

2... e6 Supports the centre, adding control of d5. Theory calls this the Classical Defense.

Classical Defense, Big Center VariationA45

1. d4 Nf6 2. Bg5 e6 3. e4

Edge VariationA45

1. d4 Nf6 2. Bg5 Ne4 3. Bh4

2... Ne4 Swings the knight to e4, hitting the bishop on g5.

Raptor VariationA45

1. d4 Nf6 2. Bg5 Ne4 3. h4

Borg VariationA45

1. d4 Nf6 2. Bg5 Ne4 3. Bf4 g5

Poisoned Pawn VariationA45

1. d4 Nf6 2. Bg5 c5 3. d5 Qb6 4. Nc3

2... c5 Challenges the pawn on d4 - the central tension has to resolve.

Raptor Variation, Hergert GambitA45

1. d4 Nf6 2. Bg5 Ne4 3. h4 Nxg5 4. hxg5 e5

The structure hands White the half-open h-file - rook pressure down it is a standing plan.

Edge Variation, Hergert Gambit, after 3... d5A45

1. d4 Nf6 2. Bg5 Ne4 3. Bh4 d5 4. f3 Nf6 5. Nc3 Bf5 6. e4

The pawns on d5 and e4 stand in direct tension - the first player to resolve it chooses the structure.

Edge Variation, Hergert Gambit, after 3... c6A45

1. d4 Nf6 2. Bg5 Ne4 3. Bh4 c6 4. Nd2 Qa5 5. c3 Nxd2 6. Qxd2 d5 7. e4

Walk these lines on a board

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