Sicilian Defense: Smith-Morra Gambit Accepted, Pin Defense
1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Bb4
The Sicilian Defense: Smith-Morra Gambit Accepted, Pin Defense 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 Bb4. 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 562 times by this move order. White won 48%, 3% were drawn and Black won 49%. The most popular continuation is 7. O-O (78% of games).
Engine evaluation: −0.31 (Stockfish, depth 46; best line 7. Qe2 Nge7 8. O-O O-O 9. Rd1 Ng6)
- ECO
- B21
- Moves
- 12 plies
- FEN
r1bqk1nr/pp1p1ppp/2n1p3/8/1bB1P3/2N2N2/PP3PPP/R1BQK2R w KQkq - 2 7- PGN
1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Bb4
Analyse with Stockfish · Board image (SVG) · Open on Lichess
Results by rating
| Average rating | Games | White / draw / Black |
|---|---|---|
| 0-1499 | 29 | |
| 1500-1999 | 297 | |
| 2000+ | 236 | |
| All | 562 |
Most played moves
| Move | Games | White / draw / Black |
|---|---|---|
| 7. O-O | 437 (78%) | |
| 7. Bd2 | 39 (7%) | |
| 7. Qe2 | 26 (5%) | |
| 7. Qc2 | 19 (3%) | |
| 7. Qb3 | 18 (3%) | |
| 7. e5 | 8 (1%) | |
| 7. Bf4 | 4 (1%) | |
| 7. Qd4 | 3 (1%) |
Master games
265 over-the-board games are classified under this line (White 35%, draw 15%, Black 50%). The strongest:
- GM Hikaru Nakamura (2736) – GM Razvan Preotu (2487) 1-0 · Titled Tuesday 16th Feb · 2021-02-16
- FM Moritz Weishaeutel (2401) – GM Anish Giri (2733) 0-1 · Titled Tue 19th Nov Early · 2024-11-19
- GM Juan Carlos Obregon Rivero (2463) – GM Denis Lazavik (2605) 0-1 · 1st 3-0 Thu 4th Dec 2025 · 2025-12-04
- FM Moritz Weishaeutel (2404) – GM Sam Shankland (2651) 0-1 · Titled Tue 28th Apr 2026 · 2026-04-28
- GM Ngoc Truong Son Nguyen (2646) – GM Alexander Fishbein (2391) 1/2-1/2 · Titled Tue 17th Dec Late · 2024-12-17
Highest-rated Lichess games
- IM MassterofMayhem (2662) – spartak20 (2682) 0-1 · 2026-09-05 · 180 + 0s
- MereseBerserkNhi (2648) – ji0sqwqgt (2696) 1-0 · 2026-09-05 · 180 + 0s
- BishopAndSons (2657) – FM EminovOrkhan (2625) 0-1 · 2026-09-05 · 180 + 0s
Comes from
Sicilian Defense: Smith-Morra Gambit Accepted 1. e4 c5 2. d4 cxd4 3. c3 dxc3
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.