Bogo-Indian Defense: Monticelli Trap

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

ECO E11

The Bogo-Indian Defense: Monticelli Trap is a chess opening line in the Bogo-Indian Defense complex, reached after 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.

It is catalogued under code E11 in the Encyclopaedia of Chess Openings (ECO).

The defining move Ng5 is chosen by White on move 10.

Study this line with a grandmaster

This position is covered in the Bogo-Indian Defense course: a GM-authored repertoire you study move by move, then practice against a human-like AI opponent.

Every chess term used here is defined in the chess terms glossary. Browse all opening courses or the full ECO code index.