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  Topic: Daily Nightmare - 30-4-07
GreenLantern

Replies: 4
Views: 6280

PostForum: Daily Sudoku Nightmare & Archive   Posted: Tue May 01, 2007 1:39 pm   Subject: Daily Nightmare - 30-4-07
Here is how I ended up solving the puzzle from your starting candidates grid.
For a good tutorial on Nice Loops for those unfamiliar with the notation, please refer to Multicoloring in 1's: r18c2,r28 ...
  Topic: 22 April 2007, Grouped AIC's and Rings
GreenLantern

Replies: 6
Views: 8817

PostForum: Daily Sudoku Nightmare & Archive   Posted: Mon Apr 30, 2007 7:04 am   Subject: 22 April 2007, Grouped AIC's and Rings
+---------------------+---------------------+---------------------+
| 235 257 25 | 4 357 8 | 6 9 1 |
| 58 159 1358 | 159 6 135 | 2 7 4 ...
  Topic: 22 April 2007, Grouped AIC's and Rings
GreenLantern

Replies: 6
Views: 8817

PostForum: Daily Sudoku Nightmare & Archive   Posted: Fri Apr 27, 2007 11:07 am   Subject: 22 April 2007, Grouped AIC's and Rings
Myth Jellies,

Thanks for providing the historical perspective and outlining the key differences between AICs and Nice Loops. This answers a lot of questions.
  Topic: 4/1/07 Nightmare
GreenLantern

Replies: 8
Views: 9470

PostForum: Daily Sudoku Nightmare & Archive   Posted: Thu Apr 26, 2007 8:07 am   Subject: 4/1/07 Nightmare
I've just posted my solution to the April 22 Nightmare as a followup to your posting. I would be interested to hear your comments on Nice Loops and AICs (my questions at the end of the post) if you h ...
  Topic: 22 April 2007, Grouped AIC's and Rings
GreenLantern

Replies: 6
Views: 8817

PostForum: Daily Sudoku Nightmare & Archive   Posted: Thu Apr 26, 2007 7:59 am   Subject: 22 April 2007, Grouped AIC's and Rings
This was a fun puzzle but took a while as there were a lot of patterns to spot. I ended up solving it with several multicolorings, patterns, and some Nice Loops (some simple and some with grouped nod ...
  Topic: 4/1/07 Nightmare
GreenLantern

Replies: 8
Views: 9470

PostForum: Daily Sudoku Nightmare & Archive   Posted: Wed Apr 11, 2007 2:48 am   Subject: 4/1/07 Nightmare
Look for a couple of Nice Loops in Boxes 1-3.
  Topic: nice loop help please
GreenLantern

Replies: 3
Views: 3943

PostForum: Help Me! I'm stuck!   Posted: Wed Apr 04, 2007 11:55 pm   Subject: nice loop help please
Into Sudoku (from which these screenshots came) is a good program, but obviously the diagrams aren't as clear as they could be. I think the two Nice Loops that the program is trying to point out are ...
  Topic: 26 Nov 2006, 2 x 4 Deadly Pattern
GreenLantern

Replies: 1
Views: 4976

PostForum: Daily Sudoku Nightmare & Archive   Posted: Sun Dec 03, 2006 9:13 pm   Subject: 26 Nov 2006, 2 x 4 Deadly Pattern
Neat solution! I don't find such large deadly patterns that easily on my own, so I appreciate good examples of them. By the way, there were several other eliminations in your XY-ring in addition to ...
  Topic: Nightmare November 8th 2006 (oops sorry not 11th)
GreenLantern

Replies: 6
Views: 7679

PostForum: Daily Sudoku Nightmare & Archive   Posted: Thu Nov 16, 2006 1:43 am   Subject: Nightmare November 8th 2006 (oops sorry not 11th)
I seldom use formal notation for loops, and I suppose it's time I began.
Looking at your nice loop (shown below), shouldn't the link between r1c2
and r3c1 (via candidate 3) be a strong link? Otherwi ...
  Topic: Nightmare November 8th 2006 (oops sorry not 11th)
GreenLantern

Replies: 6
Views: 7679

PostForum: Daily Sudoku Nightmare & Archive   Posted: Thu Nov 09, 2006 1:12 am   Subject: Nightmare November 8th 2006 (oops sorry not 11th)
I think this is actually the November 8 Nightmare:
1 . . | . . . | . . 9
. . 4 | . . 3 | . 6 .
. 7 . | 1 5 . | . . .
-------+-------+------
. . 9 | . . 4 | 3 8 .
. . 7 | . . . | 4 . 5 ...
  Topic: October 22 Nightmare Duplicate
GreenLantern

Replies: 1
Views: 1994

PostForum: Daily Sudoku Nightmare & Archive   Posted: Sat Oct 21, 2006 11:43 pm   Subject: October 22 Nightmare Duplicate
The October 22 Daily Sudoku Nightmare appears to be a duplicate of
the February 3 Nightmare.
  Topic: June 19 Nightmare
GreenLantern

Replies: 3
Views: 2467

PostForum: Daily Sudoku Nightmare & Archive   Posted: Fri Jun 23, 2006 6:02 am   Subject: June 19 Nightmare
From your starting grid, the following basic steps can be applied:
Removing 24 from r4c7
Naked Triple (178) in Box 6 => r4c8<>17, r6c9<>18
Locked Candidate '3' in Box 1 => r1c479& ...
  Topic: June 8 - 14 is Uniqueness Week!!!
GreenLantern

Replies: 1
Views: 1913

PostForum: Daily Sudoku Nightmare & Archive   Posted: Wed Jun 07, 2006 10:54 pm   Subject: June 8 - 14 is Uniqueness Week!!!
I'm looking forward to this week's puzzles as I could use more practice at spotting uniqueness patterns.

I've only recently started working through the Daily Nightmare, and it is quickly becoming m ...
  Topic: I am stuck
GreenLantern

Replies: 2
Views: 3758

PostForum: Help Me! I'm stuck!   Posted: Mon Jun 05, 2006 1:24 pm   Subject: I am stuck

+----------------------+----------------------+----------------------+
| 2345 245 1 | 9 23 7 | 56 456 8 |
| 6 249 29 | 1 8 5 | 7 ...
 
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