The starting position. White moves first, and that single tempo is the whole reason opening theory exists.
The Magnus Smith Trap
Trade on c6, push e5, and if Black takes the pawn the d-file opens onto a queen guarded only by the king.
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The idea in one paragraph
In the Classical Sicilian with the bishop on c4, heads for a Dragon a move too late. White trades on c6 so that the b-pawn recaptures and leaves d6 with no piece behind it, then pushes at the f6-knight. Taking the pawn, , opens the d-file between the two queens, and drags the king off d8's defence: wins the queen for a bishop. (Fischer's recommendation) moves the knight without opening the file.
The pawn structure
The trade on c6 leaves Black with pawns on c6 and d6 and none on b7, and the push to e5 asks the d6-pawn to leave the d-file. That file, with a queen at each end, is the whole trap: a pawn on d6 is the only thing keeping the queens apart, and the king is the only thing guarding d8.
The plans
♔ White’s plans
- Against ...g6 with the bishop already on c4, trade and push . The pawn hits the f6-knight and offers itself.
- If Black takes on e5, check first: . The bishop drags the king off d8's only defence.
- Against , the engine's answer is : keep the e5-pawn defended and develop.
♚ Black’s plans
- Answer with , Fischer's move. The knight hits e5 and the d-file stays shut.
- Then strike with ...d5: the pawn hits the c4-bishop, and after Nxd5 ...Bg7 wins the e5-pawn back.
- Head for the queenless middlegame: the queens come off on d1, and Black's isolated a- and c-pawns are the only price.
Traps and things that lose games
The Magnus Smith Trap
. The cure: .
Trap 2
The second-best knight move, , is not good enough either: joins the bishop against f7 and hits c6, and the engine gives White more than two and a half pawns.
Its cousin in the Sicilian, from the other chair
the Siberian Trap against the Smith-Morra.
1.e4 players who meet the Classical Sicilian with Bc4, and Sicilian players who like to fianchetto their bishop. The trap is old and well known, which is exactly why ...g6 with the bishop on c4 keeps catching club players.
Your learning path: The Magnus Smith Trap
IntermediateOne trap from both chairs: spring it against ...g6 as White, and meet 8.e5 with Fischer's knight jump as Black.
- FoundationOne sitting
Goal. Spring it as White, and never fall for it as Black.
- The order: Nxc6 first so the b-pawn recaptures, then e5.
- The punishment: 9.Bxf7+ Kxf7 10.Qxd8. Check before you take the queen.
- From Black's chair: 8...Ng4!, and not 8...dxe5 or 8...Nh5.
DrillDrill the trap as White, then the sidestep as Black. Then set up the position after 8.e5 and say what each of Black's three captures and knight moves opens.Common mistakeTaking on d8 at once after 8...dxe5. 9.Qxd8+ Kxd8 trades queens; 9.Bxf7+ first is what wins one.Move on whenYou can explain, without a board, why the d-file decides the game after 8...dxe5. - StructureAfter the Sicilian chapter
Goal. Play the queenless middlegame after 8...Ng4 from Black's side.
- ...d5 and ...Bg7: winning the e5-pawn back.
- The queen trade on d1, and why the king belongs on e7 afterwards.
DrillPlay the position after 13...Nxe5 against an engine as Black.Common mistakeCastling short in the queenless position. The king is a fighting piece once the queens are off.Move on whenYou hold the position after 13...Nxe5 against an engine without losing a pawn.
Whose games to study
Wikipedia's Magnus Smith Trap article gives the move order and its history. Every evaluation here comes from Stockfish at depth twenty.
What to learn after this
The Sicilian Defence course, and the Siberian Trap, which Black sets against the Smith-Morra.