A40 (+B00)

Borg Defense

5 named lines in this family, ECO A40 (+B00). 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.

Borg Gambit, after 1. d4A40

1. d4 g5

In the centre, White holds d4.

• 1. d4 Stakes a claim in the centre, controlling e5, and frees the bishop and queen.
• 1... g5 Opens the f8-h6 diagonal for the bishop. The pawn is genuinely on offer - this is the Borg Gambit: development and initiative over material.

Main lineB00

1. e4 g5

In the centre, White holds e4.

• 1. e4 Stakes a claim in the centre, controlling d5, and frees the bishop and queen.
• 1... g5 Theory calls this the Borg Defense.

Borg Gambit, after 1. e4B00

1. e4 g5 2. d4 Bg7

Black's kingside bishop takes the long diagonal.

• 2... Bg7 Fianchettoes the bishop onto the long diagonal, pressuring d4 and e5 from a distance.

Zilbermints GambitB00

1. e4 g5 2. d4 e5

In the centre, White holds d4 and e4 while Black holds e5.

• 2... e5 Stakes a claim in the centre, controlling d4, and frees the bishop and queen. The pawn is genuinely on offer - this is the Zilbermints Gambit: development and initiative over material.

Troon GambitB00

1. e4 g5 2. d4 h6 3. h4 g4

In the centre, White holds d4 and e4.

• 2... h6 Takes g5 away from White's bishop.

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