Can you create a sudoku?
Think about
- What would be an efficient way to create a puzzle?
- How difficult would you like it to be?
- What is the maximum number of 3×3 squares you could remove and it still be solvable? Does it matter which squares?
- Could you design it so that it could be easily transformed into mutliple versions? How many versions could be created from your one puzzle?
Here is a fascinating article on how one website generates their sudokus and a paper proving the minimum number of clues needed.