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## 'Knight's Swap' printed from http://nrich.maths.org/

### Why do this
problem?

This problem requires children to make use of visualisation and
to develop their own methods of recording.

### Key questions

Do you know how a knight moves in chess?

What could you try first?

How will you record the moves?

### Possible extension

Suggest to learners that you can now put the two stars on the
board anywhere except the middle square. Can they find a way to put
them on so that it is impossible to switch the pieces? Can they
give a really clear explanation?

### Possible support

Pupils might like to draw a square and use some counters to
help them see the moves.