Réti vs ...c6 and ...Nf6: Double Fianchetto (New York System)
Réti vs ...c6 and ...Nf6: Double Fianchetto (New York System) is variation 3 of 6 in the Réti Opening and King's Indian Attack course, a intermediate opening course for White (ECO A11). It runs 23 moves and begins 1. Nf3 d5 2. c4 c6 3. b3 Nf6 4. g3 Bf5 …. Black builds a Slav setup with ...c6, ...d5, ...Nf6 and ...Bf5. White fianchettoes both bishops and keeps the centre flexible with d3, Nbd2 and a later e4 or b4. In the lesson every move is explained on a board and then drilled; it is free.
Move by move
1. Nf3 – Develops and keeps options open.
1... d5 – Black takes the centre.
2. c4 – Attacks d5 from the side.
2... c6 – Supports d5 with a pawn, Slav-style.
3. b3 – Prepares Bb2 and keeps c4 protected if Black takes on c4.
3... Nf6 – Develops and supports d5.
4. g3 – Prepares the second fianchetto on g2.
4... Bf5 – Develops the bishop outside the pawn chain before ...e6.
5. Bg2 – The bishop takes the long diagonal, aiming at d5 and b7.
5... e6 – Completes the Slav triangle.
6. Bb2 – The second fianchetto: both bishops aim at the centre.
6... Nbd7 – Develops and supports ...e5.
7. O-O – White castles.
7... h6 – Gives the f5 bishop a retreat on h7, so Nh4 cannot win the bishop pair.
8. d3 – Controls e4 and prepares Nbd2 and e4.
8... Be7 – Develops and prepares castling.
The lesson goes on for 7 more moves, each with its explanation.
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