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  Topic: April 1 Hard
Zoelly

Replies: 5
Views: 28823

PostForum: Daily Sudoku puzzles   Posted: Mon Apr 06, 2009 3:37 am   Subject: April 1, Hard
Hi Swando,
I was in similar "blind" mode on this one for days.
This evening I finally saw the numbers that broke the log jam.

Did you get it solved? If not, I'll give a hint.
Zoelly
  Topic: March 4, '09, hard
Zoelly

Replies: 17
Views: 66449

PostForum: Daily Sudoku puzzles   Posted: Fri Mar 20, 2009 2:19 am   Subject: March 4, '09, hard
When naked quads are made of subsets like those seen in box 9, I don't spot them easily. I'm glad you pointed them out for me, Marty.

It's that the 4 appears in only two squares and the 2 appear ...
  Topic: March 4, '09, hard
Zoelly

Replies: 17
Views: 66449

PostForum: Daily Sudoku puzzles   Posted: Thu Mar 19, 2009 2:52 am   Subject: March 4, '09, hard
Norm,
Well, I kinda do know about all the red 8's, I think!

Is that to show you're eyeballing them --- because you're working on the theory that they're part of a hidden pair?
Green 7's, the same ...
  Topic: March 4, '09, hard
Zoelly

Replies: 17
Views: 66449

PostForum: Daily Sudoku puzzles   Posted: Thu Mar 19, 2009 2:40 am   Subject: March 4, '09, hard
Hi Ho!
I've solved the puzzle!

Thanks to Nataraj, especially, for telling me to look at 3's in box 1. There were so many 3's scattered about in this puzzle that I must have just started to igno ...
  Topic: March 4, '09, hard
Zoelly

Replies: 17
Views: 66449

PostForum: Daily Sudoku puzzles   Posted: Wed Mar 18, 2009 4:54 am   Subject: March 4, '09, hard
8 . . |3 7.|. 4 .
. 6 4|. . 1|. . .
. 7 9|. 6 .|. . 2
-----+----+-----
4 . .|7 5 2|. . 8
2 . .|. 1 . |. . 7
7 . .|6 9 .|. . 1
----+---- +-----
9 . .|. 3 .|5 . .
. . . |5 . .| ...
  Topic: March 4, '09, hard
Zoelly

Replies: 17
Views: 66449

PostForum: Daily Sudoku puzzles   Posted: Tue Mar 17, 2009 3:48 am   Subject: March 4, '09, hard
I think you might be right, Norm.
Hidden pairs can be so hard to find.
I don't know the term "intersection."

So far I've done FOUR Box-Line Reductions in this puzzle.
1) In Box 1 be ...
  Topic: March 4, '09, hard
Zoelly

Replies: 17
Views: 66449

PostForum: Daily Sudoku puzzles   Posted: Sun Mar 15, 2009 5:25 pm   Subject: March 4, '09, hard
thanks!
i'll keep studying the numbers
  Topic: March 4, '09, hard
Zoelly

Replies: 17
Views: 66449

PostForum: Daily Sudoku puzzles   Posted: Sun Mar 15, 2009 5:31 am   Subject: March 4, '09, hard
Does this puzzle require any solution techniques beyond the basics: finding pairs, hidden pairs, box-line reduction, or row claiming?
 
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