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Jam
Age 14 to 16
Challenge Level 
The map has 8 towns (T1 to T8) and 9 roads (A1 to A9). Take it in turns to claim a road, blocking it completely to your opponent (N.B. your road may go through 3 or even 4 towns and when you claim it you block it completely from end to end).
To win you must block all the roads from one of the towns (i.e. 3 different colours).
Can you devise a strategy so that you never lose?
Can you explain your strategy?
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Start with any number of counters in any number of piles. 2 players take it in turns to remove any number of counters from a single pile. The loser is the player who takes the last counter.
