The New Sudoku Players' Forum

[busino06]

Code: Select all

   
        9XX   X3X   7XX
        XXX   X5X   X69
        7XX   X19    2X3
         
        XXX   14X    5XX
        X8X   5X3    X1X
        XX2   X68    XXX
   
        2X1   3XX    XX5
        X3X   X8X    XXX
        XX7   XXX    XX4
       

[Ruud]

Hi,

You must be new to sudoku.

In the left-lower 3x3 box, there is only one position left for digit 8.

Ruud.

[busino06]

Hey thx Ruud,yes I`m new at this.

[QBasicMac]

Hey thx Ruud,yes I`m new at this.

Then you're probably stuck again after placing 8 in row 9, column 1 (r9c1=8)

Look at r6c9.
1 - can't go there because of the 1 in r5c8
2 - can't go there because of the 2 in r6c3
3 - can't go there because of the 3 in r3c9
etc. for all candidates except 7

Since there is only one digit that can go there, you can solve r6c9=7

So you have two techniques now,

r9c1=8 because there was no other cell in its box that could be 8.
In general, find the only cell in some box, row or column where you can put some candidate.

r6c9=7 because no other candidate would be legal here.
In general, find a cell where only one candidate can fit.

Those are all you need to solve this puzzle, but it will be tough.

Have fun!

Mac

[busino06]

Hey thx all,needed that.