The New Sudoku Players' Forum

[domwelby]

Gday and Hi

Found an interesting alternative solution (or pair of soluitions) to this one. Bit over-excited - does this happen often?

Thanks

Dom

[Glyn]

domwelby Welcome to the forum.
I don't have a copy of that puzzle, but unless it slipped through the net it should only have one solution. Is it possible that you could post the starting grid so someone can have a look at it.

[domwelby]

Of course Glyn, having done a ridiculous number of these i was pretty surprised. Do you have a grid template on the site I can use, or a dummies guide to making and uploading grids?

thanks

Dom

[Glyn]

domwelby If you don't have any software the simplest would be to use 9 lines of the 9 digits, with a zeros for the blank cells.

[domwelby]

Hi Glyn, its:

0 0 0 0 5 7 0 8 0
3 0 0 0 0 0 0 0 0
0 0 2 9 0 0 4 0 0

2 0 0 8 0 9 3 0 0
4 0 0 0 0 0 0 0 7
0 0 7 4 0 6 0 0 8

0 0 6 0 0 2 7 0 0
0 0 0 0 0 0 0 0 5
0 9 0 3 1 0 0 0 0

thanks

Dom

[Glyn]

Well the grid was pretty routine singles all the way and only one solution. Hopefully one of your solutions was:-

Code: Select all

.------.------.------.
| 6 4 9| 2 5 7| 1 8 3|
| 3 7 8| 6 4 1| 5 2 9|
| 5 1 2| 9 8 3| 4 7 6|
:------+------+------:
| 2 6 1| 8 7 9| 3 5 4|
| 4 8 3| 1 2 5| 6 9 7|
| 9 5 7| 4 3 6| 2 1 8|
:------+------+------:
| 8 3 6| 5 9 2| 7 4 1|
| 1 2 4| 7 6 8| 9 3 5|
| 7 9 5| 3 1 4| 8 6 2|
'------'------'------'

Not sure how you found another one.

[domwelby]

Absolutely Glyn, thats the solution in the book
My solution as follows - I've left the 2 and 6 option in for the two alternative solutions. Must have done something wrong somewhere - can you put me out of my misery?

9 1 4 2/6 5 7 2/6 8 3
3 7 8 2/6 4 1 5 1 2/6
6 5 2 9 8 3 4 7 9

2 6 1 8 7 9 3 5 4
4 8 9 1 3 5 2/6 2/6 7
5 3 7 4 2 6 1 9 8

8 4 6 5 9 2 7 3 1
1 2 3 7 6 8 9 4 5
7 9 5 3 1 4 8 2/6 2/6

thanks again

Dom

[Glyn]

domwelby Difficult to tell where you went wrong.. Best to start again from scratch.

My guess is that it went awry when you put the 9 in Row 3 Column 9 instead of Row 2 Column 9, there is a given 9 in Row 3 Column 4.

[domwelby]

aah yes - thankyou so much
best wishes
Dom