Smith-Morra Gambit
Initial Moves: 1.e4 c5 2.d4 cxd4 3.c3
Strategic Summary & Main Idea
The Smith-Morra Gambit gives up a pawn against the Sicilian on move three: 2.d4 cxd4 3.c3 offers the c-pawn for fast development and the open c- and d-files. The measurement states the price plainly: after 3.c3 the position is −0.20, and in the classical formation, with Bc4, Qe2 and Rd1, −0.11. The gambit refutes nothing, but it does not lose either — White plays a fifth of a pawn below equality, in a position Black has to know. And the line's most famous trap works against White: in the Siberian, 9.h3 loses to mate and measures −5.20.
The pawn structure this opening produces
After 3...dxc3 4.Nxc3, the Morra structure is an open Sicilian in which White has neither a d-pawn nor a c-pawn. White's centre is the lone e4 pawn, and the two open files beside it are what the pawn bought. The rook on c1 aims at c7, the rook on d1 aims at d6, and those are the two permanent weak points in Black's position while the d-pawn sits on d6 and the f8 bishop has not come out. Black has an extra queenside pawn and a structure with no weaknesses, but a slow one: the typical set-up, ...Nc6, ...d6, ...e6, ...Nf6 and ...Be7, needs five moves before castling. White's play is all pieces — Bc4, O-O, Qe2, Rd1 and knights ready for d5 or b5 — and the e5 push, which opens the d-file and dislodges the f6 knight, is the break that decides. Once Black castles and plays ...a6 and ...b5, the extra pawn starts to count, and the Morra becomes a balanced position with less material.
Typical Plans for White
- Develop in the standard formation — Nxc3, Nf3, Bc4, O-O, Qe2 and Rd1 — before any break
- Prepare e5 against the f6 knight to open the d-file with the rook on d1
- Bring a knight to d5 or b5 when the e6 pawn or the c7 square is unprotected
- Against the Siberian with ...Qc7 and ...Ng4, never play 9.h3: the position goes to −5.20
- Against the 3...Nf6 decline, push 4.e5 and transpose to an Alapin with the knight already on d5
Typical Plans for Black
- Accept with 3...dxc3 and develop with ...Nc6, ...d6, ...e6 and ...Nf6 before castling
- Play ...e6 on move six instead of ...Nf6: the ...e6 order measures −0.16
- Set up ...a6 and ...b5 after castling and return the pawn only once White's attack is neutralised
- In the Siberian, prepare ...Ng4 and ...Nd4 against h3, with the queen on c7 aiming at h2
- Do not decline with 3...d3: the returned pawn measures +0.66 and hands White the centre for free
Main Variations of the Smith-Morra Gambit
| Variation | Move Sequence | Evaluation | Style / Characteristic |
|---|---|---|---|
| Accepted (3...dxc3) | 1.e4 c5 2.d4 cxd4 3.c3 dxc3 |
−0.15 | The natural and most played reply; Black keeps the pawn |
| Classical Formation | 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 6.Bc4 e6 7.O-O Nf6 8.Qe2 Be7 9.Rd1 |
−0.11 | Bc4, Qe2 and Rd1 against d6; the position the gambit is after |
| Siberian (6...Qc7) | 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 Qc7 7.O-O Nf6 8.Qe2 |
−0.07 | The queen on c7 prepares ...Ng4 and ...Nd4 against White's king |
| Siberian with 8...Ng4 | 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 Qc7 7.O-O Nf6 8.Qe2 Ng4 |
+0.21 | The knight comes out early and the position turns in White's favour — unless White plays h3 |
| Set-up with ...a6 and ...Ne7 | 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 a6 7.O-O Nge7 |
−0.02 | The g8 knight comes out via e7 and leaves f6 free; equality |
| Fianchetto (5...g6) | 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 g6 6.Bc4 Bg7 7.e5 |
+0.03 | The g7 bishop aims at e5, and White pushes the pawn against it |
| Decline with 3...Nf6 | 1.e4 c5 2.d4 cxd4 3.c3 Nf6 4.e5 Nd5 |
+0.08 | Transposition to the Alapin Variation with the pawn already exchanged |
| Decline with 3...d5 | 1.e4 c5 2.d4 cxd4 3.c3 d5 4.exd5 Qxd5 5.cxd4 |
+0.19 | The queen recovers the centre, and White is left with an active isolated pawn |
| Decline with 3...d3 | 1.e4 c5 2.d4 cxd4 3.c3 d3 |
+0.66 | The pawn returned at once; the highest White evaluation in the entry |
Evaluations measured by us with Stockfish 19, depth 22, on 15/09/2026.
Frequently asked questions
Is the Smith-Morra Gambit sound?
It gives no advantage, but it does not lose either: the position after 3.c3 measures −0.20, and the classical formation −0.11. That is a fifth of a pawn below equality, playable at any club level. What the gambit buys is a position of active pieces against an opponent who must know the right developing order.
What is the Siberian trap?
After 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 Qc7 7.O-O Nf6 8.Qe2 Ng4, the natural 9.h3 loses: 9...Nd4! and, if 10.Nxd4, 10...Qh2 is mate. The position after 9.h3 measures −5.20. It is the trap that punishes a Morra played on autopilot, not Black.
Is it worth declining the Smith-Morra?
It depends on the decline. 3...Nf6 4.e5 Nd5 measures +0.08 and transposes to an Alapin, and 3...d5 measures +0.19. But 3...d3 measures +0.66, worse for Black than accepting (−0.15). Anyone who does not want to study the accepted Morra has an almost free way out in 3...Nf6.
Guides on this opening
Common Mistakes & Where Most Amateurs Go Wrong
- 01 Playing 9.h3?? in the Siberian, chasing the g4 knight. The reply is 9...Nd4!, and if the f3 knight takes, 10...Qh2# — the queen on c7 and the knight on g4 were already aiming at h2. The position after 9.h3 measures −5.20. The line:
1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 Qc7 7.O-O Nf6 8.Qe2 Ng4 9.h3−5.20 - 02 Trading queens with 7...dxe5? after 6...Nf6 7.e5. It looks like simplification, but 8.Qxd8+ Nxd8 9.Nb5 hits c7 and leaves Black's king unable to guard the square: +0.96, against +0.04 for the 7...Ng4 retreat. The line:
1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 6.Bc4 Nf6 7.e5 dxe5 8.Qxd8+ Nxd8 9.Nb5+0.96
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