The Smith-Morra Gambit Accepted, Siberian Variation, Siberian Trap is a variation of the Sicilian Defense, catalogued as ECO B21. The line runs 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Qc7 7. Qe2 Nf6 8. O-O Ng4, reaching the position shown below after 16 half-moves.
White holds the centre with pawns on e4. Development is level at three minor pieces each, and Black is up a pawn of material. It is White to move after eight moves. White has castled while Black’s king is still uncommitted; the c-file file is fully open.
On the Sicilian Defense generally: The most popular and aggressive response to 1.e4. Black fights for the center asymmetrically, leading to rich tactical play.
You can play through this variation move by move in your browser — Learn mode walks the line with an explanation at each step, and Drill mode replays it from memory so you find out whether you actually know it. No account is required.
See all 238 Sicilian Defense variations →
The Smith-Morra Gambit Accepted, Siberian Variation, Siberian Trap goes 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Qc7 7. Qe2 Nf6 8. O-O Ng4. It is a variation of the Sicilian Defense and is catalogued as ECO B21.
The Smith-Morra Gambit Accepted, Siberian Variation, Siberian Trap is ECO B21. ECO codes group openings by their move order, so nearby codes cover closely related lines of the Sicilian Defense.
Stockfish evaluates the position after 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Qc7 7. Qe2 Nf6 8. O-O Ng4 at +0.33 at depth 18, which is a slight pull for White, within normal opening margins. Engine evaluation is only a starting point — at club level the practical value of a line is mostly about whether you know its plans better than your opponent does.
White holds the centre with pawns on e4. Development is level at three minor pieces each, and Black is up a pawn of material. It is White to move. White has castled while Black’s king is still uncommitted; the c-file file is fully open.