Library/Openings/Catalan Opening/Closed/Main Line ECO E09
Opening· 15 plies

Catalan Opening: Closed, Main Line

An entry in the Encyclopedia of Chess Openings (ECO E09), reached after 15 half-moves: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O Nbd7 7. Qc2 c6 8. Nbd2.

Catalan Opening: Closed, Main Line ECO E09
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Black rook
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Black queen
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Black king
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Black knight
Black bishop
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White pawn
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White king
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End of this line

No further variations branch from this position in our database. To explore neighbouring ideas:

About this opening

Catalan Opening: Closed, Main Line is an opening in the Encyclopedia of Chess Openings, classified under code E09. ECO group E (E00–E99) covers Indian defences against 1.d4, covering the Nimzo-Indian, Queen's Indian, King's Indian and Catalan systems. This particular variation is reached after 15 half-moves from the starting position, with the move sequence 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O Nbd7 7. Qc2 c6 8. Nbd2.

It belongs to the Catalan Opening family. Within that family this is a level-2 branch (the Closed → Main Line line). The immediate parent line is Catalan Opening: Closed, transitioned via 8.Nbd2.

The opening sequence in prose form: 1.d4 Nf6, 2.c4 e6, 3.Nf3 d5, 4.g3 Be7, 5.Bg2 O-O, 6.O-O Nbd7. From this position the encyclopaedia records no further canonical continuations — practical play branches into unnamed transpositions or returns to the parent line for alternative ideas.