Today I have set you three of these Sudoku. They follow the standard rule that all numbers are formed from 1 to 9 in each row, column, and 3×3 box, and there are additional rules.
Cells containing either columns, columns, or 3×3 boxes (left to right, top to bottom to bottom read) are gold.
In other words, if the cell is gold, its position must be described in one of the three mentioned methods, and if the cell is white, it must not be displayed. (See the original post for a more detailed explanation and tutorial.)
Additional constraints mean that there are no clues in the starting grid. This is a very elegant and interesting solution.
Here they have a solution again. If you want a PDF printout of all three puzzles, click here.
1. (This is 6×6, so the numbers are 1 to 6, and box 2×3)
2.
3.
1.
2.
3.
Thank you to Alf Smith for inventing these puzzles.
I'll come back in 2 weeks.
I've been setting up a puzzle here on alternative Mondays since 2015. I'm always looking for great puzzles. If you would like a suggestion please email me.
