The New Sudoku Players' Forum

[gonzo]

Hello. I've been enlisted to join the beta testing team on a program called Ichiban Sudoku from a company called Vellosoft.

I'm totally stuck at this point and I'm wondering if it's me or maybe I need to report back to them that they've created a puzzle that doesn't have a logical solution. (Most likely it's me, because I'm not the most experienced sudoku solver in the world, but if it's on the puzzle itself, I've got to let them know.)

Here it is. This is from the genius level.

Code: Select all

6     128   5     |34    48    28    |7     123   9
7     4     389   |369   1     2689  |368   5     2368
123   128   1389  |7     689   5     |1368  1236  4
--------------------------------------------------------
8     5     46    |2     7     1     |9     346   36
12    3     14    |69    689   689   |45    7     125
9     126   7     |5     3     4     |168   126   1268
--------------------------------------------------------
4     7     2     |8     5     3     |16    9     16
13    9     136   |146   2     7     |45    8     35
5     168   1368  |1469  469   69    |2     34    7


[tso]

It's you. No exotic solving tactics are required.

[ravel]

No need to be genius. Look at the 3 in column 7/box 3 for the next step.

[Kent]

I can see the 3in box 3 and in column 7 are the only 3 at column 7.How do u continue?

[gonzo]

Thanks for the replies, I thought it was probably me . . .

I'm looking at column 7 / box 3 and I still don't see how you solve any of the cells to a 3. Can you tell me which technique it is that I'm missing?

[gonzo]

(i.e., what Kent said . . . )

[Tumbleweed]

(i.e., what Kent said . . . )

In column 7, the only 3's are in box 3. Therefore, 1 of those must be a 3 (else there would be no 3 in column 7).
Therefore, all of the other 3's in box 3 can be removed.

Once you do that, there is only one 3 in row 1.

Tw

[Crazy Girl]

What you have go is locked candidates, as all 3's in column 7 are in Box 3 the rest of the 3's in Box 3 can be eliminated.. with me so far ... Now where can 3 go in Row 1.

For more techniques i suggest you check out the links below
http://www.angusj.com/sudoku/hints.php
http://www.simes.clara.co.uk/programs/sudokutechniques.htm

Tumbleweed sumbitted her/his post before i did, so sorry for the repeat post

[gonzo]

Ding! The light-bulb just went off. Thanks to both of you for taking the time to reply!

I'll be checking out those links, too. Thanks!