Overloading (chess)

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Krasenkow–Karpov
Solid white.svg a b c d e f g h Solid white.svg
8  black king  black king  black king  black king  white bishop  black king  black king  black king 8
7  black pawn  black king  black king  black king  black king  black pawn  black pawn  black king 7
6  black king  black pawn  black king  black king  black king  black queen  black knight  black pawn 6
5  black king  black king  black bishop  white rook  black king  black king  black king  black king 5
4  white queen  black king  black king  black king  black king  black king  black king  black king 4
3  black king  black king  black king  black king  black king  white pawn  white pawn  black king 3
2  black king  black king  black king  black king  black rook  black king  black king  white pawn 2
1  black king  black king  black king  black king  black king  white rook  black king  white king 1
Solid white.svg a b c d e f g h Solid white.svg
Black to play

Overloading is a chess tactic in which a defensive piece is given an additional defensive assignment which it cannot complete without abandoning its original defensive assignment.

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[edit] Examples

KrasenkowKarpov,[1] in the first round of the 2003 Corus chess tournament, reached the diagrammed position with Black to play. As the white rook on f1 is tied to the defense of the pawn on f3, Black won immediately with 1... Re1, overloading the rook: If 2. Rxe1 or 2. Qc4, then 2... Qxf3#. If 2. Kg2, then similarly, 2... Rxf1 3. Kxf1 Qxf3+ and 4... Qxd5.

An overload was also used in Rotlewi versus Rubinstein.

[edit] References

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