The Bogo-Indian Defense: Retreat Variation reaches a named position after 10 moves: 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
In practical games, this line matters because the early pawn and piece choices decide which middlegame plans are natural. Use the board above to learn the move order, then complete Practice without hints before adding the opening to your regular queue.
If this exact branch does not appear in your games, study the related lines below. Openings often transpose, and recognizing the family pattern is more useful than memorizing one narrow sequence.
Position details
The defining move is Nbd2.
r1bq1rk1/p2nbppp/1pp1pn2/3p4/2PP1B2/5NP1/PPQNPPBP/R4RK1 b - - 1 10