Smith-Morra Gambit (B21)
White sacrifices a pawn against the Sicilian for rapid development and open lines.
Taught for White · 3 study lines · main line: 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6…
Free spaced-repetition drills — no account needed to analyze, and the trainer remembers what you have learned.
How do you reach the Smith-Morra Gambit?
1.e4 c5 2.d4 cxd4 3.c3 — the Smith-Morra: White pays a pawn to rip open the c- and d-files against the Sicilian. Development comes with threats on c- and d-lines; Black’s queenside sleeps while White’s rooks arrive.
What does the Smith-Morra Gambit give you — and cost you?
For
- Turns the Sicilian — Black’s choice — into YOUR preparation battle.
- Thematic to its bones: Nc3/Bc4/Qe2/Rd1 slot in nearly every game.
- Punishes routine Sicilian moves brutally.
Against
- Declining with 3...Nf6 or 3...d3 sidesteps into ordinary positions.
- Best defense reaches endgames a clean pawn down for White.
- One tempo wasted and the compensation evaporates.
What is the plan in the Smith-Morra Gambit?
The Smith-Morra: give the d-pawn to rip open the c- and d-files — White’s rooks, bishops and queen arrive with threats before Black’s extra pawn means anything.
Which Smith-Morra Gambit lines should you study?
Acceptedalso known as: Sicilian Defense: Smith-Morra Gambit Accepted, Paulsen Formation
1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 a6 7.O-O Nge7 8.Bg5 f6 9.Be3 b5 10.Bb3 Ng6
Final book move played in 50 master games.
The full Morra: the c-file open and the d-file half-open by move four, Bc4/Qe2/Rd1 pointed at Black’s camp. This line’s ...a6/...Nge7 defense is Black’s best try — and the position where you must know YOUR plans, not just threats.
His ...f6/...Ng6 wall blunted the first wave — good defenders do that. The Morra’s second wave is positional: Nd5-or-Nd4 sacrifice patterns stay in the air, the d6-square begs for a knight, and his undeveloped queenside pieces mean every open file is yours by default. Play Rd1/Rc1, Qe2, and probe: one tempo of black carelessness re-ignites the attack in full.
Declinedalso known as: Sicilian Defense: Alapin Variation, Smith-Morra Declined
1.e4 c5 2.d4 cxd4 3.c3 Nf6 4.e5 Nd5 5.Nf3 Nc6 6.cxd4 d6 7.Bc4 Nb6 8.Bb5 dxe5 9.Nxe5 Bd7 10.Nxd7 Qxd7
Final book move played in 1,140 master games.
3...Nf6 declines into an Alapin — literally the same position as the c3-Sicilian, and that is the teaching point: your Morra preparation buys you a second opening for free. Play the e5/Bc4 squeeze with confidence.
The forcing sequence traded down into the classic Alapin structure: your d4-pawn versus his solid-but-passive setup, queens still probing. His knight walked to b6 to force the trade — fine: your bishop pair and the d4-pawn’s space persist into the simplified position. Develop fast — O-O, Re1-or-Rd1 — and claim the d5-square; the grind is yours. Declining the Morra dodged the storm, not the grind.
Declined with ...e6also known as: Sicilian Defense: Alapin Variation, Smith-Morra Declined
1.e4 c5 2.d4 cxd4 3.c3 Nf6 4.e5 Nd5 5.Nf3 e6 6.cxd4 d6 7.Bc4 Nc6 8.O-O Be7 9.Qe2 O-O 10.Nc3 Nxc3 11.bxc3
Final book move played in 446 master games.
The ...e6 decline keeps more tension than ...Nc6 — Black wants a small, safe French-like game. Your O-O/Qe2 setup keeps the initiative flowing through the same channels: the c- and d-files.
The trade on c3 released the tension and handed you the cleaner game: better bishop, the half-open b-file after bxc3, and a mobile centre pawn duo. This declined line is quieter than the gambit promised — so win it quietly: Rd1 behind the d-pawn, Bf4-or-Bg5, Rb1 pressure on b7, and remember that a Morra player with equal material and better placement has already profited.
What do opponents play against the Smith-Morra Gambit at your level?
Reply shares from Lichess blitz, rapid and classical games, split by the rating band of the players — because the sideline that dominates beginner games often disappears entirely from stronger ones. Book moves in the study line are marked.
From the starting positionstudy line continues c5
| Lichess band | Most played | 2nd | 3rd |
|---|---|---|---|
| <1200 | e5 60.9% | d5 11% | c5 6.9%book |
| 1200s | e5 56.6% | c5 11%book | d5 9.5% |
| 1400s | e5 50.7% | c5 14.7%book | d5 8.9% |
| 1600s | e5 42.3% | c5 19.5%book | e6 10.3% |
| 1800s | e5 32.9% | c5 24.7%book | e6 11.7% |
| 2000s | c5 29.9%book | e5 24.5% | e6 12.7% |
| 2200+ | c5 35.8%book | e5 19.2% | e6 12.5% |
After 1.c5study line continues cxd4
| Lichess band | Most played | 2nd | 3rd |
|---|---|---|---|
| <1200 | cxd4 59%book | d6 10.5% | e6 9.9% |
| 1200s | cxd4 71.7%book | e6 9.7% | Nc6 6% |
| 1400s | cxd4 79.2%book | e6 7.8% | Nc6 5.6% |
| 1600s | cxd4 83.7%book | e6 5.8% | Nc6 5.5% |
| 1800s | cxd4 85.6%book | Nc6 5.2% | e6 4.8% |
| 2000s | cxd4 86.9%book | e6 4.5% | Nc6 4.2% |
| 2200+ | cxd4 89.2%book | e6 3.7% | Nc6 2.8% |
Shares are of games in each band at that position, from the Lichess opening explorer data the trainer itself studies from.
How often do opponents go wrong against the Smith-Morra Gambit?
Of the players who reach the Smith-Morra Gambit (after 1.e4 c5 2.d4 cxd4 3.c3), the share who make a mistake or blunder on the lines we teach, by rating band. Every reply is graded against Stockfish with the game review's own labels; each figure is a lower bound. How we measure.
| Lichess band | Make a mistake | Within | Games |
|---|---|---|---|
| <1200 | 25% | 10 moves | 198K |
| 1200s | 22% | 10 moves | 677K |
| 1400s | 19% | 10 moves | 1.9M |
| 1600s | 17% | 10 moves | 3.8M |
| 1800s | 17% | 10 moves | 5.3M |
| 2000s | 21% | 10 moves | 4.0M |
| 2200+ | 21% | 10 moves | 1.4M |
How should you learn the Smith-Morra Gambit?
Moves first, then the idea behind each move, then spaced review until recall is automatic — the method, the review schedule, and why cramming fails are covered in the opening-learning guide. The trainer here implements it directly: guided learning with the reason attached to each move, validation before practice, and a Leitner review ladder that keeps the lines you drill from evaporating.
Frequently asked questions
17% of Lichess players rated 1600–1799 who reach the Smith-Morra Gambit make a mistake or blunder on the lines we teach within the first 10 moves (3.8M games, a lower bound). Every reply is graded against Stockfish with the same Mistake and Blunder labels as the game review; the full method is on our how-we-measure page.
AxiomChess teaches 3 study lines for this opening, each roughly ten moves deep — sourced from master practice and checked move-by-move against Stockfish before being taught. Depth past the point where a plan takes over adds review cost without adding wins.
Every move in the study lines here is engine-checked before it is taught, so the lines themselves hold up. The honest trade-offs are listed above — declining with 3...nf6 or 3...d3 sidesteps into ordinary positions — and knowing when the plan does not apply matters as much as the moves.
Your games already show which openings you actually reach and where they go wrong — the trainer picks drills from your own measured slips.
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