Overloading (chess)

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

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

Krasenkow-Karpov 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 2... Rxf1 3. Kxf1 Qxf3+ and 4...Qxd5.

[edit] References

http://www.chessclub.com/cgi-bin/view-game.pl?id=1075187665

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