CONCENTRATION
-------------
Match the symbols, taking as few turns as possible. There are fifteen
pairs of graphics hidden in the grid. The squares in the grid are
numbered one to thirty so, to choose two squares, simply enter their
numbers. When you have matched all the pairs you are told how many turns
you took.

Concentration was written for the 16K Spectrum by Stephen McLeod, aged
13, of Morpeth, Northumberland.