A little puzzle to try out pattern matching, you select the size of board, number in sequence (not) to match, and number of colours available. Your objective is to try to visit every coloured block without matching a sequence within the last 15 blocks visited.
You always fail with small board, two in sequence and two colours, and can always find a way through on the large board, 4 sequence and 5 colours. It would be interesting to find how far you can go with the other size/sequence/colours combinations - there does not seem to be a mathematical relationship.
James