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Defend against checkmate: protecting (2)

You already know a lot of good tricks to prevent mate. In this lesson, we’ll teach you another one. This time, you are going to wriggle out of mate by using an X-ray defense.

You have seen X-ray defenses before. Do you remember? You protect a piece by looking right through another piece! A really clever trick!

In stead of protecting pieces, we are now using the X-ray defense to guard squares. Mating squares, to be precise. Study the example and you will know how to do this.

What do you have to do?
Use an X-ray defense to prevent checkmate.