Petrov's Defence, Marshall Trap

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Solid white.svg a b c d e f g h Solid white.svg
8  black rook  black knight  black king  black queen  black king  black rook  black king  black king 8
7  black pawn  black pawn  black pawn  black king  black king  black king  black pawn  black pawn 7
6  black king  black king  black king  black bishop  black king  black king  black king  black king 6
5  black king  black king  black king  white pawn  black king  black pawn  black king  black king 5
4  black king  black king  black king  white pawn  black knight  black king  black bishop  black king 4
3  black king  black king  black king  white bishop  black king  white knight  black king  black king 3
2  white pawn  white pawn  black king  black king  black king  white pawn  white pawn  white pawn 2
1  white rook  white knight  white bishop  white queen  white rook  black king  white king  black king 1
Solid white.svg a b c d e f g h Solid white.svg
Position after 10.Re1?
Black wins with 10...Bxh2+!

The Marshall Trap is a chess opening trap in Petrov's Defence named after Frank Marshall.

The trap begins with the moves

1. e4 e5
2. Nf3 Nf6

Black plays Petrov's Defence.

3. Nxe5 d6
4. Nf3 Nxe4
5. d4 d5
6. Bd3 Bd6
7. O-O O-O
8. c4 Bg4
9. cxd5 f5
10. Re1?

(See diagram.) White should play 10.Nc3 instead.

10. ... Bxh2+!

An unexpected blow.

11. Kxh2 Nxf2

Black forks the white queen and bishop, forcing the queen to move.

12. Qe2 Nxd3
13. Qxd3 Bxf3
14. Qxf3 Qh4+ followed by Qxe1 winning a rook.

[edit] References

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