Bogo-Indian Defense: Retreat Variation is a chess opening with the ECO code E11, part of the Bogo-Indian Defense family. It goes 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Bb4+ 5. Bd2 Be7 6. Bg2 O-O 7. O-O c6 8. Qc2 Nbd7 9. Bf4 b6 10. Nbd2 Ba6. White opens with 1. d4 (the queen's pawn) and Black answers 1... Nf6. After 20 moves it is White to move. The lesson on the board explains every move of the line and lets you play it yourself; it is free.
The moves
1. d4 – White plays the pawn to d4
1... Nf6 – Black plays the knight to f6
2. c4 – White plays the pawn to c4
2... e6 – Black plays the pawn to e6
3. Nf3 – White plays the knight to f3
3... d5 – Black plays the pawn to d5
4. g3 – White plays the pawn to g3
4... Bb4+ – Black plays the bishop to b4, giving check
5. Bd2 – White plays the bishop to d2
5... Be7 – Black plays the bishop to e7
6. Bg2 – White plays the bishop to g2
6... O-O – Black castles kingside
The line goes on for 8 more moves; the lesson shows them all.
In chessGM's opening book this position continues with 11. Rfd1.
About the Bogo-Indian Defense
After 1.d4 Nf6 2.c4 e6 3.Nf3, Black gives check with 3...Bb4+. It is a calm, solid cousin of the Nimzo-Indian.
White blocks with Bd2 or Nbd2; Black often trades bishops.
Black can play ...Qe7 and ...d6 with ...e5, or ...d5 for a QGD-like game.
The trade of dark-squared bishops makes Black's position easier.
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