Queen's Indian: 4.g3 Ba6 5.b3 is variation 5 of 6 in the Against the Nimzo-Indian and Queen's Indian course, a advanced opening course for White (ECO E15). It runs 25 moves and begins 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 …. Black's bishop goes to a6 to attack c4. White guards it with b3, puts the bishop on g2 and trades knights on d7. Then White grabs the centre with e4. In the lesson every move is explained on a board and then drilled; it is free.
Move by move
1. d4 – White takes the centre.
1... Nf6 – Black develops.
2. c4 – White gains space.
2... e6 – Black opens the bishop.
3. Nf3 – White develops the knight and avoids the Nimzo pin.
3... b6 – The Queen's Indian. The bishop goes to the long diagonal to watch e4.
4. g3 – White prepares to put the bishop on g2 to fight Black's bishop.
4... Ba6 – Black attacks the c4 pawn.
5. b3 – White guards c4 with a pawn.
5... Bb4+ – Black checks to make White's bishop block on d2.
6. Bd2 – White blocks the check.
6... Be7 – Black drops back. The d2 bishop now blocks the b1 knight's best square.
7. Bg2 – The bishop takes the long diagonal.
7... c6 – Black prepares to push the d-pawn to d5.
8. Bc3 – The bishop moves away to free d2 for the knight.
8... d5 – Black takes the centre.
The lesson goes on for 9 more moves, each with its explanation.
More in Against the Nimzo-Indian and Queen's Indian
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