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## THE EXCHANGE PUZZLE.

(

Moving Counter Problem)

Here is a rather entertaining little puzzle with moving counters. You

only need twelve counters--six of one colour, marked A, C, E, G, I, and

K, and the other six marked B, D, F, H, J, and L. You first place them

on the diagram, as shown in the illustration, and the puzzle is to get

them into regular alphabetical order, as follows:--

A B C D

E F G H

I J K L

The moves are made by exchanges of opposite colours standing on the same

line. Thus, G and J may exchange places, or F and A, but you cannot

exchange G and C, or F and D, because in one case they are both white

and in the other case both black. Can you bring about the required

arrangement in seventeen exchanges?

It cannot be done in fewer moves. The puzzle is really much easier than

it looks, if properly attacked.

Read Answer