Library/Openings/Sicilian Defense/Kan Variation/Swiss Cheese Variation ECO B42
Opening· 10 plies

Sicilian Defense: Kan Variation, Swiss Cheese Variation

An entry in the Encyclopedia of Chess Openings (ECO B42), reached after 10 half-moves: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 g6.

Sicilian Defense: Kan Variation, Swiss Cheese Variation ECO B42
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Black rook
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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

Sicilian Defense: Kan Variation, Swiss Cheese Variation is an opening in the Encyclopedia of Chess Openings, classified under code B42. ECO group B (B00–B99) covers semi-open games (1.e4 with Black playing anything other than 1…e5), with the Sicilian, French, Caro-Kann and Pirc/Modern at its heart. This particular variation is reached after 10 half-moves from the starting position, with the move sequence 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 g6.

It belongs to the Sicilian Defense family. Within that family this is a level-2 branch (the Kan Variation → Swiss Cheese Variation line). The immediate parent line is Sicilian Defense: Kan Variation, transitioned via 5…g6.

The opening sequence in prose form: 1.e4 c5, 2.Nf3 e6, 3.d4 cxd4, 4.Nxd4 a6, 5.Bd3 g6. 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.