The classic sliding block puzzle. The 15-puzzle consists of a 4-by-4 grid with tile numbered $1$ to $15$ placed in the grid. The object of this puzzle is to randomly ...
This puzzle consists of 20 numbered round pieces in one long looped track. You can slide all the pieces around the loop, or use the turntable in the loop (this is the purple circle which contains ...
But forget all that. I threw down a REAL challenge — to go head to head with me on some of the toughest puzzles in The Sun. Before we get down to business, a bit more about the young upstart.