Two groups of Scots face each other, ready for battle. The only thing between them are the boundary stones. Try to remove the stones by playing cards and placing the highest numbers on a stone. Whoever is the first to claim five stones – or three connecting stones – wins. But there's one more little thing to consider: if you can prove that your opponent can't claim a stone, then you can take possession of the stone. Can you be the first to cross the border?

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