At a café in Toowoomba, some friends and I were intrigued by a simple-looking puzzle made to entertain children. It was made of a few dozen tyres laid out, with coloured planks attaching them.

The puzzle IRL.

The rules were simple: follow the planks in order of Red, Blue, Green, starting from the single tyre next to the rules board, and get to the raised tyre in the centre.

Thomas Cranny

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