You have 6 stones*, 3 of one colour and 3 of another colour, arranged on a card with 8 squares as shown on the left.
You have to move the stones in the top row to the bottom row and those
in the bottom row to the top row.
We are going to play with beer bottle tops today. So you have to move
How many moves do you need to swap the positions of the tops?
|* This is a fun game to play in a bar (or on the beach) with two sets of different coins, pebbles or bottle tops.|
|Problem adapted from:
Godfrey Hall. 1991. The Book of Mindbenders. Kingfisher Books, London.
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