Puzzles
I enjoy number puzzles, like Sudoku for instance (and particularly the Sandwich variant). Here are some puzzles which I thought were very elegant:
The Listener Crossword No. 4608 – A numerical crossword with an amazing finish. Recommend using Excel to assist in the solve.
The Listener Crossword No. 4595 – Another numerical crossword with multiple steps after completing the grid. Again Excel helps.
Snake Egg by Murat Can Tonta – A very clean tight solution path from such an incredibly minimal starting grid
Solutions are available online, otherwise message me if you need.