About this opening
Sicilian Defense: Smith-Morra Gambit Accepted, Siberian Variation 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 12 half-moves from the
starting position, with the move sequence 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Qc7.
It belongs to the Sicilian Defense family.
Within that family this is a level-2 branch (the Smith-Morra Gambit Accepted → Siberian Variation line). The immediate parent line is Sicilian Defense: Smith-Morra Gambit Accepted, transitioned via 6…Qc7.
The opening sequence in prose form: 1.e4 c5, 2.d4 cxd4, 3.c3 dxc3, 4.Nxc3 Nc6, 5.Nf3 e6, 6.Bc4 Qc7. From this position exactly one named continuation is recorded in the encyclopaedia.
Use the interactive board above to walk through the moves position-by-position. Click any move in the navigation to step backwards, or use the keyboard arrow keys. The list of recorded continuations sits directly below the board. For statistical data — how often master-level players have reached this position, White's win-rate, draw frequency, Black's score — see the panel in the right column.
Caissly's coverage of B21 extends through every named sub-variation in this line and across all four locales (English, Spanish, Portuguese, Russian). Where editorial commentary exists for a specific variation it appears as the page body; otherwise the page presents the structural data, board, and statistics as shown here.