Chess Opening Theory/1. d4/1...Nf6/2. c4/2...e6/3. Nf3/3...b6/4. g3
|Queen's Pawn Opening|
Queen's Indian Defense
With this move, White decides to challenge the h1-a8 diagonal immediately and fianchetto his own light-squared bishop to counter black's.
Black can now play:
- 4...Bb7, a standard developing move. White can then respond with Bg2 and Nc3.
- 4...Ba6, attacking the c-pawn. This is a bit of a nuisance for white, who cannot comfortably defend the pawn with the natural e2-e3 because the bishop is already committed to g2.
- 4...Bb4+, echoing the Bogo-Indian and Nimzo-Indian defences. White can interpose with the bishop or knight.
There are other options available, though these are less likely to be encountered:
- 4...c5, immediately challenging the (central) d-pawn. This leads to pawn structures specific to the Benoni or to variations with a late c5 of the Queen's Indian, if both sides choose to neglect this central challenge and continue to develop
- 4...c6, leads to a Closed Catalan variation after Black's immediate 5...d5 follow-up
1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3
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