This blog deals with grid-based puzzles and the various types of logic and ideas used to solve them. It also contains notices, information and results about various puzzle and sudoku championships across the globe.
Rules of 'Untouchable Sudoku'
Place numbers in the grid such that each row, column and thick-outlined region contain the numbers 1 to 7. Same numbers cannot touch each other even diagonally.
Even though these grids are 7x7, some of the puzzles are really difficult.
ReplyDeletethis was very simple and can be cracked with so many given hints.
ReplyDeletehowever, here is a difficult one
https://www.funwithpuzzles.com/2010/05/untouchable-sudoku-us1.html
where we can't even proceed without understanding the additional rule. but there is no solution given there to help understand.
please give some example in this puzzle as to where the additional rule permits or prohibits repetition of digits.
Thanks.
I'm trying to get an example of an 8x8 untouchable sudoku with solution - any suggestions?
ReplyDelete