## Fiendish No. 195; 1 July

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### Fiendish No. 195; 1 July

I'm not having a good week. I'm stuck on this puzzle after adding 11 numbers to the 25 given. I'm not alone: Pete Shaw's 'Su Doku Solver' can't do it either. Could it be misprinted? Or is it just black Friday?
Bernard Stay

Posts: 94
Joined: 22 March 2005

No definitely can be done - and logically too.

Post the grid where you are stuck for a hint
su_doku

Posts: 30
Joined: 19 March 2005

Thanks. I'm here:-

**6|345|*91
***|***|5**
*95|7*6|**3

*21|*3*|6**
**8|*6*|9**
*69|*7*|13*

6*3|2*7|*5*
**4|6**|3**
9**|453|***
Bernard Stay

Posts: 94
Joined: 22 March 2005

Look at column 2 - there's a pair of cells where the 3 and 4 can go. That will allow you to place a number in box 7
su_doku

Posts: 30
Joined: 19 March 2005

Thanks s_d. I really should have spotted the 3/4 pairs - bad eye day. That puts a 5 in the middle of box 7 as you say, and removes the 1 from c1r8. Then what?
Bernard Stay

Posts: 94
Joined: 22 March 2005

Look at where the 7's can go in column 1; make some eliminations.
Look at where the 7's can go in row 9; make some eliminations.
You will now be able to fill a cell in block 3.
scrose

Posts: 322
Joined: 31 May 2005

Look at where the 7's can go in column 1; make some eliminations.
Look at where the 7's can go in row 9; make some eliminations.
You will now be able to fill a cell in block 3.

And it all comes out! Nothing but the sort of thing I've been doing everyday since New Year! As I said - a bad eye day!

But thanks folks. To the morrow!
Bernard Stay

Posts: 94
Joined: 22 March 2005

It really is easy...

Where can it go in column 1? (Remember what you said about column 2).
What does this mean for box 7?
What does this mean for column 7?
Animator

Posts: 469
Joined: 08 April 2005

And it all comes out!
su_doku

Posts: 30
Joined: 19 March 2005

Indeed... I must have mis-read that :(
Animator

Posts: 469
Joined: 08 April 2005

I was stuck with this one until I read the tips above.
possum

Posts: 86
Joined: 05 April 2005

scrose wrote:Look at where the 7's can go in column 1; make some eliminations.
Look at where the 7's can go in row 9; make some eliminations.
You will now be able to fill a cell in block 3.

Hmm. Still struggling at this point. Could you be a little more specific?

Posts: 3
Joined: 04 July 2005

Look at number 7 for columns 2 and 7.

By doing so, you willl see that it is only possible to put it in either one of 2 combinations. Either combination will make it possible for you to eliminate the 7 from all other columns for these rows.
Anette

Posts: 55
Joined: 09 June 2005

Anette wrote:Look at number 7 for columns 2 and 7.

By doing so, you willl see that it is only possible to put it in either one of 2 combinations. Either combination will make it possible for you to eliminate the 7 from all other columns for these rows.

Ah. Thanks, got it now.

Posts: 3
Joined: 04 July 2005

I don't see how Bernard Stay used the 3/4 pair clue for column 2 to come to the conclusion that there should be a 5 in the middle of box 7. Could someone perhaps elaborate?

Kind regards,

Tom Wirschell
Tom Wirschell

Posts: 4
Joined: 06 July 2005

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