The Bogo-Indian Defense: Monticelli Trap reaches a named position after 10 moves: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 Bxd2+ 7. Qxd2 O-O 8. Nc3 Ne4 9. Qc2 Nxc3 10. Ng5
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 Ng5.
rn1q1rk1/pbpp1ppp/1p2p3/6N1/2PP4/2n3P1/PPQ1PPBP/R3K2R b KQ - 1 10