HATMAN wrote:
How did you produce the pretty diagrams?
Spreadsheet.
Thanks for the point about complex numbers. Did not think about it before.
One of an aspiration for me is to produce Sudoku-like puzzles which can be understood all over the world (e.g. in rural Africa/Asia where Arabic numerals are not used), and perhaps even by aliens!
By the way I showed puzzle #1 to my 11-year-old nephew, who didn't have much experience in classic Sudoku. She managed to work out the correct answer in 10 minutes. That's why I thought it was an appropriate straight forward puzzle for Christmas. Guess I was wrong.