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Problem of the Week
2007.02.25
     
 
 
  
White to move and win
[need a hint?]
[Solution]
[archive]
White to move &
win
1.Qd7+ Bxd7 2.Nd6+
Double-check! Of course, it's also a knight-fork against the
black queen, but White has a bigger target in mind.
While there are normally three ways to get out of check (move the
king, interpose, capture the checking piece) when someone is in
double-check the only way out is to move the king. This is the
power of the double-check! 2...Kd8 3.Nf7+ Kc8
Now, if White could only place a rook on d8, he'd have mate! But
the d7-bishop blocks the path. Of course, a white rook on e8
would mate just as effectively as one on d8, but once again that pesky
d7-bishop guards his monarch by threatening to capture any white piece
landing on e8. Now that should ring a bell for you - a piece
with more than one job to do is an overworked piece! It can't do
both jobs at once. 4.Re8+ Bxe8 5.Rd8 mate
In just this one problem you have seen
a queen sacrifice, a double-check,
and a clearance sacrifice resulting in checkmate on a
vulnerable back rank made possible by an overworked piece.
Whew! That's a full day's workout in tactics right there!
[archive]
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