A41-A55

Old Indian Defense

14 named lines in this family, ECO A41-A55. Every one of them opens 1. d4, so that move's note is 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

• 1. d4 Stakes a claim in the centre, controlling e5, and frees the bishop and queen.

Main line, after 1... d6A41

1. d4 d6 2. c4

In the centre, White holds d4.

• 1... d6 Supports the centre, adding control of e5.
• 2. c4 Fights for d5 from the flank - contesting the centre without committing a centre pawn. Theory calls this the Old Indian Defense.

Main line, after 1... Nf6A53

1. d4 Nf6 2. c4 d6

• 1... Nf6 Develops the knight to f6, eyeing d5 and e4.

Aged Gibbon GambitA53

1. d4 Nf6 2. c4 d6 3. g4

Czech Variation, with Nc3A53

1. d4 Nf6 2. c4 d6 3. Nc3 c6

Czech Variation, with Nf3A53

1. d4 Nf6 2. c4 d6 3. Nf3 c6

Janowski VariationA53

1. d4 Nf6 2. c4 d6 3. Nc3 Bf5

Janowski Variation, Fianchetto VariationA53

1. d4 Nf6 2. c4 d6 3. Nc3 Bf5 4. g3

Janowski Variation, Grinberg GambitA53

1. d4 Nf6 2. c4 d6 3. Nc3 Bf5 4. e4

In the centre, White holds d4 and e4.

Janowski Variation, Main LineA53

1. d4 Nf6 2. c4 d6 3. Nc3 Bf5 4. f3

Tartakower-IndianA54

1. d4 Nf6 2. c4 d6 3. Nf3 Bg4

Ukrainian VariationA54

1. d4 Nf6 2. c4 d6 3. Nc3 e5

The pawns on d4 and e5 stand in direct tension - the first player to resolve it chooses the structure.

Two Knights VariationA54

1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. Nf3

Duz-Khotimirsky VariationA54

1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. e3 Nbd7 5. Bd3

Normal VariationA55

1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. e4 e5 5. Nf3

Walk these lines on a board

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