About this opening
Sicilian Defense: Smith-Morra Gambit Accepted, Kan Formation is an opening in the Encyclopedia of Chess Openings,
classified under code B21. 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. d4 cxd4 3. c3 dxc3 4. Nxc3 e6 5. Nf3 a6.
It belongs to the Sicilian Defense family.
Within that family this is a level-2 branch (the Smith-Morra Gambit Accepted → Kan Formation line). The immediate parent line is Sicilian Defense: Smith-Morra Gambit Accepted, transitioned via 5…a6.
The opening sequence in prose form: 1.e4 c5, 2.d4 cxd4, 3.c3 dxc3, 4.Nxc3 e6, 5.Nf3 a6. 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.