Siberian Trap
B21 · Played as black · Intermediate · Traps & Tricks
Accept the Smith-Morra, ignore the attacked knight, and mate on h2
The main 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 Nd4 10.Nxd4 Qh2#
Strategic ideas
- Take the Smith-Morra pawn and develop with …Qc7 aiming at the h2-diagonal
- Jump the knight to g4 where it eyes h2 and f2
- Answer h3 with …Nd4!, hitting the queen and ignoring the attacked knight
- Punish the automatic Nxd4 with mate on h2
- Learn the trap that makes Smith-Morra players nervous about the whole gambit
Key themes
- Tactics — Two black pieces and one diagonal produce a forced mate out of a normal-looking position
- Counterattack — Black takes the gambit pawn and turns White's own attacking setup into the losing factor
- King Safety — White castles into safety and gets mated on h2 nine moves later
Typical plans
Every Smith-Morra player should know this and most don't. Black takes the pawn, develops normally, and puts the queen on c7 pointing down the b8–h2 diagonal. The knight hops to g4, White plays the natural h3 to kick it — and Black replies …Nd4!, ignoring the attacked knight entirely because the queen on e2 is hanging. If White grabs the knight with the automatic Nxd4, then …Qh2 is mate: the g4-knight covers the escape and White's own rook on f1 blocks the last flight square.
Move by move
- e4 — White claims the centre.
- c5 — Black answers asymmetrically with the Sicilian.
- d4 — White strikes at once.
- cxd4 — Black takes.
- c3 — White offers the Smith-Morra Gambit pawn.
- dxc3 — Black accepts — this is the honest test of the gambit.
- Nxc3 — White recaptures with the knight, a pawn down with a big lead in development.
- Nc6 — Black develops naturally.
- Nf3 — White develops and controls the centre.
- e6 — Black shores up d5 and opens the f8-bishop's path.
- Bc4 — White develops toward f7, the standard Morra setup.
- Qc7 — Black puts the queen on c7. It looks like ordinary development — and it quietly aims at h2, which is where this game is going to end.
- O-O — White castles, entirely normally.
- Nf6 — Black develops and eyes e4.
- Qe2 — White lines the queen up behind the e-pawn — the standard Morra move, and the one that makes the trap possible.
- Ng4 — Black jumps to g4, hitting f2 and h2.
- h3 — White kicks the knight. Natural, and now the trap is armed.
- Nd4 — Black plays …Nd4!! — ignoring the attacked knight completely, because the queen on e2 is hanging. White has to deal with the fork first.
- Nxd4 — White takes the knight, which looks like the obvious solution. It's mate in one.
- Qh2# — Black plays …Qh2 mate. The g4-knight defends the queen so the king can't take, the g2-pawn and f2-pawn block two escape squares, and White's own rook on f1 blocks the last one. The Siberian Trap, and the reason Morra players fear …Qc7.