Sicilian Defense: Smith-Morra Gambit Accepted, Siberian Variation, Siberian Trap
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
The Sicilian Defense: Smith-Morra Gambit Accepted, Siberian Variation, Siberian Trap is a chess opening classified as ECO B21, reached 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. It is a line of the Sicilian Defense. White is to move.
In 12.6 million rated Lichess games (blitz and slower), this position was reached 11 times by this move order. White won 36%, 0% were drawn and Black won 64%. The most popular continuation is 9. h3 (27% of games).
Engine evaluation: 0.00 (Stockfish, depth 42; best line 9. Rd1 Bc5 10. Nb5 Qb8 11. h3 Nge5)
- ECO
- B21
- Moves
- 16 plies
- FEN
r1b1kb1r/ppqp1ppp/2n1p3/8/2B1P1n1/2N2N2/PP2QPPP/R1B2RK1 w kq - 6 9- PGN
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
Analyse with Stockfish · Board image (SVG) · Open on Lichess
Results by rating
| Average rating | Games | White / draw / Black |
|---|---|---|
| 1500-1999 | 7 | |
| 2000+ | 4 | |
| All | 11 |
Most played moves
| Move | Games | White / draw / Black |
|---|---|---|
| 9. h3 | 3 (27%) | |
| 9. Rd1 | 2 (18%) | |
| 9. g3 | 2 (18%) | |
| 9. Be3 | 1 (9%) | |
| 9. Nb5 | 1 (9%) | |
| 9. Nd5 | 1 (9%) | |
| 9. Bg5 | 1 (9%) |
Master games
3 over-the-board games are classified under this line (White 0%, draw 0%, Black 100%). The strongest:
- Jan Hyll (1976) – GM Oliver Mihok (2509) 0-1 · V4 Stiavnica Open 2016 · 2016-07-02
- Dick Sorensen (2023) – Jan Mose Nielsen (2130) 0-1 · Politiken Cup 2012 · 2012-08-05
- Jonas Weissenhofer (1719) – Felix Noetzel (2263) 0-1 · European Online CC GpA · 2021-03-28
Highest-rated Lichess games
- marc100 (2279) – botvinnik36 (2259) 0-1 · 2026-09-02 · 180 + 2s
- mohsen5157m (2100) – Maespi (1977) 1-0 · 2026-09-01 · 180 + 2s
- Zakariasf (1977) – JOEYNOOTH (2082) 0-1 · 2026-09-02 · 180 + 2s
Comes from
Sicilian Defense: Smith-Morra Gambit Accepted, Siberian Variation 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Qc7
More Sicilian Defense lines (all)
- Sicilian Defense (1. e4 c5) B20
- Sicilian Defense: Amazon Attack B20
- Sicilian Defense: Big Clamp Formation B20
- Sicilian Defense: Bowdler Attack B20
- Sicilian Defense: Brick Variation B20
- Sicilian Defense: Czerniak Attack B20
- Sicilian Defense: Czerniak Attack, Queen Fianchetto Variation B20
- Sicilian Defense: Euwe Attack, Prins Gambit B20
- Sicilian Defense: Gloria Variation B20
- Sicilian Defense: Grob Variation B20
- Sicilian Defense: Keres Variation B20
- Sicilian Defense: King David's Opening B20
Opening names and moves from the Lichess openings dataset; statistics from the Lichess open database, 2026-09 (CC0), sample of 12.6 million games, bots excluded; evaluations from Lichess cloud analysis (all CC0). Master games from The Week in Chess #920–#1664 by Mark Crowther, used with permission.