Library/Openings/Nimzo-Indian Defense/Sämisch Variation/Romanovsky Variation ECO E25
Opening· 16 plies

Nimzo-Indian Defense: Sämisch Variation, Romanovsky Variation

An entry in the Encyclopedia of Chess Openings (ECO E25), reached after 16 half-moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Bxc3+ 6. bxc3 c5 7. cxd5 Nxd5 8. dxc5 f5.

Nimzo-Indian Defense: Sämisch Variation, Romanovsky Variation ECO E25
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Black rook
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Black queen
Black king
Black rook
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White pawn
Black knight
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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

Nimzo-Indian Defense: Sämisch Variation, Romanovsky Variation is an opening in the Encyclopedia of Chess Openings, classified under code E25. 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 16 half-moves from the starting position, with the move sequence 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Bxc3+ 6. bxc3 c5 7. cxd5 Nxd5 8. dxc5 f5.

It belongs to the Nimzo-Indian Defense family. Within that family this is a level-2 branch (the Sämisch Variation → Romanovsky Variation line). The immediate parent line is Nimzo-Indian Defense: Sämisch Variation, transitioned via 8…f5.

The opening sequence in prose form: 1.d4 Nf6, 2.c4 e6, 3.Nc3 Bb4, 4.f3 d5, 5.a3 Bxc3+, 6.bxc3 c5. 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.