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Pin party: skewer

Another lesson about breaking pins. Once again, you are going to take advantage of the fact that pinned pieces are worthless defenders. This time, you will apply a skewer to win material.


You are going to use skewers in two ways:

  1. You setup a skewer on a quare that is 'guarded' by a pinned piece;
  2. The skewer creates a simultaneous attack on the king or piece/square AND on a piece/square that is guarded by a pinned piece.

Once you have studied the examples you will understand how this works.

 
What do you have to do?

Win material by setting up a skewer.


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Two black rooks are on the same file, in this case diagonal a2-g8.
The white bishop knows what to do with that! The bishop moves to d5 (Bg2-g5).
But why shouldn't the biship be captured there by the black pawn?
Because that pawn is pinned: when the pawn leaves, the black king is in check.
Black can save one rook, but he loses the other one.