Sicilian Defense: Smith-Morra Gambit Accepted, Fianchetto Defense (4. Nxc3 g6)
1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 g6
The Sicilian Defense: Smith-Morra Gambit Accepted, Fianchetto Defense is a chess opening classified as ECO B21, reached after 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 g6. 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 1,627 times by this move order. White won 54%, 4% were drawn and Black won 42%. The most popular continuation is 5. Nf3 (55% of games).
Engine evaluation: 0.00 (Stockfish, depth 57; best line 5. Bc4 Nc6 6. Nf3 Bg7 7. e5 Nh6)
- ECO
- B21
- Moves
- 8 plies
- FEN
rnbqkbnr/pp1ppp1p/6p1/8/4P3/2N5/PP3PPP/R1BQKBNR w KQkq - 0 5- PGN
1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 g6
Analyse with Stockfish · Board image (SVG) · Open on Lichess
Results by rating
| Average rating | Games | White / draw / Black |
|---|---|---|
| 0-1499 | 162 | |
| 1500-1999 | 1,195 | |
| 2000+ | 270 | |
| All | 1,627 |
Most played moves
| Move | Games | White / draw / Black |
|---|---|---|
| 5. Nf3 | 901 (55%) | |
| 5. Bc4 | 575 (35%) | |
| 5. f4 | 26 (2%) | |
| 5. Qd4 | 26 (2%) | |
| 5. Bf4 | 23 (1%) | |
| 5. Be3 | 20 (1%) | |
| 5. Bd3 | 16 (1%) | |
| 5. e5 | 9 (1%) |
Master games
71 over-the-board games are classified under this line (White 49%, draw 6%, Black 45%). The strongest:
- GM Juan Carlos Obregon Rivero (2520) – GM Maksim Chigaev (2631) 0-1 · Titled Arena Apr 3rd 2021 · 2021-04-03
- FM Ivan Babikov (2239) – GM Visakh N R (2546) 0-1 · Titled Tue 21st Nov Early · 2023-11-21
- IM Antoine Bournel (2436) – FM Anastasios Tsiolakidis (2298) 1-0 · Titled Tue 28th Apr 2026 · 2026-04-28
- FM Andrei Purygin (2309) – FM Nadya Toncheva (2326) 0-1 · Titled Tue 20th Jan 2026 · 2026-01-20
- FM Andrei Purygin (2309) – FM Andrii Punin (2289) 1/2-1/2 · Titled Tue 7th Jul 2026 · 2026-07-07
Highest-rated Lichess games
- Alifchess (2307) – Naxcho (2585) 1-0 · 2026-09-02 · 180 + 0s
- FM two_colors (2380) – CM Godaga77 (2364) 1/2-1/2 · 2026-09-06 · 300 + 0s
- Stegobert_Duck (2350) – FM monty82 (2350) 1-0 · 2026-09-01 · 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.