This game for two players comes from Ghana. However, stones that were marked for this game in the third century AD have been found near Hadrian's Wall in Northern England.
Some puzzles requiring no knowledge of knot theory, just a careful inspection of the patterns. A glimpse of the classification of knots and a little about prime knots, crossing numbers and knot arithmetic.
Investigations based on an Indian game.
This game can be played against the computer, or against a friend. The challenge is to draw three lines to gather as many diamonds as you can.
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