Siberian Trap

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This article uses algebraic notation to describe chess moves.
Image:chess zhor 26.png
Image:chess zver 26.png a8 rd b8 c8 bd d8 e8 kd f8 bd g8 h8 rd Image:chess zver 26.png
a7 pd b7 pd c7 qd d7 pd e7 f7 pd g7 pd h7 pd
a6 b6 c6 nd d6 e6 pd f6 g6 h6
a5 b5 c5 d5 e5 f5 g5 h5
a4 b4 c4 bl d4 e4 pl f4 g4 nd h4
a3 b3 c3 nl d3 e3 f3 nl g3 h3 pl
a2 pl b2 pl c2 d2 e2 ql f2 pl g2 pl h2
a1 rl b1 c1 bl d1 e1 f1 rl g1 kl h1
Image:chess zhor 26.png
Black wins with 9...Nd4!

The Siberian Trap is a chess opening trap.

After a series of natural moves in the Smith-Morra Gambit of the Sicilian Defence, White can lose a queen. The name appears to result from Boris Shipkov of Novosibirsk. The trap has occurred at least twice in tournament play: Kolenbet–Shipkov, Khabarovsk 1987, and Tesinsky–Magerramov, Budapest 1990.

Here are the moves:

1. e4 c5

This is the Sicilian Defense.

2. d4 cxd4
3. c3 dxc3

White's 3.c3 introduces the Smith-Morra Gambit. Black accepts the gambit pawn.

4. Nxc3 Nc6
5. Nf3 e6
6. Bc4 Qc7
7. 0-0 Nf6
8. Qe2

White prepares e4-e5. This move is playable if White is careful on the next move. After 8.Re1 Bc5 Black has a good game as White's f2 square is sensitive. White also doesn't achieve much after 8.h3 a6. Instead, NCO suggests 8.Nb5 Qb8 9.e5 Nxe5 10.Nxe5 Qxe5 11.Re1 and White has some compensation for the sacrificed pawns.

8. ... Ng4!
9. h3??

(See diagram.) This is a decisive mistake. The same fate befell White after 9.Bb3?? in Kramadzhian-Shipkov, Novosibirsk 1988. Another try that doesn't work is 9.Rd1 Bc5. MCO-14 recommends 9.Nb5! Qb8 (threatening 10...a6 11.Nc3 Nd4!) 10.h3 h5 11.g3 Nge5 12.Nxe5 Nxe5 13.Bf4 a6 with a sharp position with roughly equal chances.

9. ... Nd4!

The Black threat of 10...Nxf3+ followed by 11...Qh2# wins White's queen, at least. If 10.Nxd4?, Qh2#.

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