by **Smythe Dakota** » Tue Jul 18, 2006 11:16 am

General observation:

If you take a valid, completed, regular Sudoku grid, and change all the 4's and 7's to 1's, and all the 5's and 8's to 2's, and all the 6's and 9's to 3's, you have a valid, completed, 123 Sudoku grid.

But the original clue set, converted as above, will probably no longer be sufficient to establish a unique solution.

As I recall, the maximum number of clues in an independent clue set is known to be somewhere in the 30's, and the thought-to-be-minimum is 17. Has anybody given any thought (shudder) to what the maximum and minimum might be in the 123 case? I assume both would be higher than for regular Sudoku.

Bill Smythe

Last edited by

Smythe Dakota on Wed Jul 19, 2006 7:11 am, edited 1 time in total.