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  Topic: Help! Another Evil one from 1sudoku.net
ronk

Replies: 19
Views: 18674

PostForum: Other puzzles   Posted: Sat Sep 05, 2015 5:41 pm   Subject: Help! Another Evil one from 1sudoku.net
.-------------------.-----------.---------------.
| 6 38 137 | 39 78 4 | 2 5 19 |
| 34 5 134 | 39 2 6 | 7 8 19 |
| 79 89 2 | 1 78 5 | 6 4 3 ...
  Topic: NAM Puzzles
ronk

Replies: 7
Views: 7851

PostForum: Other puzzles   Posted: Thu Mar 06, 2014 11:04 pm   Subject: NAM Puzzles
Look for hidden pairs in R3 and C9..
Thanks, finally figured out this leads to completion of the 8s template. Now onward to the next "break through", for me anyway. Smile

edit: Reposted wit ...
  Topic: NAM Puzzles
ronk

Replies: 7
Views: 7851

PostForum: Other puzzles   Posted: Wed Feb 26, 2014 3:44 pm   Subject: NAM Puzzles
I guess no one except me (and perhaps Pat) finds these interesting, so I wont bother to post them.
keith, even though I'm really not a puzzle solver, I've started this in Simple Sudoku, without penci ...
  Topic: Is this a Nice loop
ronk

Replies: 2
Views: 12637

PostForum: Solving techniques, and terminology   Posted: Tue Dec 03, 2013 5:29 pm   Subject: Is this a Nice loop
Is this a valid nice loop?

The syntax of the loop is correct but no exclusions result. If r6c8 is an 8, it cannot be 9; if 9 it cannot be an 8. This is what your loop says and no exclusion can be m ...
  Topic: Impossible Menneske No. 09
ronk

Replies: 21
Views: 16304

PostForum: Other puzzles   Posted: Thu Mar 21, 2013 10:38 pm   Subject: Impossible Menneske No. 09
#1. Locked Subsets and Nishio; UP27
r5c5=6
NP(89)r5c46
To add some precision to this discussion, would you please provide the pencilmarks and tag the candidates involved in the first (or the most i ...
  Topic: Feb 8 VH
ronk

Replies: 10
Views: 8960

PostForum: Daily Sudoku puzzles   Posted: Sat Feb 09, 2013 12:16 am   Subject: Feb 8 VH
A BUG+1 pattern occurs when all cells are bivalue with one trivalue.That cell with an extra candidate may have any number of extra candidates. IOW it is polyvalued.I'm sure your definition is correct. ...
  Topic: Feb 8 VH
ronk

Replies: 10
Views: 8960

PostForum: Daily Sudoku puzzles   Posted: Fri Feb 08, 2013 5:17 pm   Subject: Feb 8 VH
A BUG+1 pattern occurs when all cells are bivalue with one trivalue.
That cell with an extra candidate may have any number of extra candidates. IOW it is polyvalued.
  Topic: Extended Unique Rectangles - Solving the 3,2,3,3 MUG
ronk

Replies: 13
Views: 33083

PostForum: Solving techniques, and terminology   Posted: Thu Feb 07, 2013 2:55 pm   Subject: Extended Unique Rectangles - Solving the 3,2,3,3 MUG
I believe "deadly pattern" only applies to the solution, and is to be avoided. A solution here is
+---------+
|1 3 |
| |
| |
+---------+
|2 1 |
| ...
  Topic: Free Press February 1, 2013
ronk

Replies: 6
Views: 6553

PostForum: Other puzzles   Posted: Sun Feb 03, 2013 4:24 am   Subject: Free Press February 1, 2013
dp
5839r89c238 => 6r9c2; stte
With 4 digits for 3 columns, I suspect this is not valid.
  Topic: Sudopedia: Kraken Fish
ronk

Replies: 8
Views: 23269

PostForum: Solving techniques, and terminology   Posted: Sun Nov 25, 2012 4:08 pm   Subject: Sudopedia: Kraken Fish
elsewhere

au tough November 19, 2012
.5.9..7..3.....48....6........7....1.78.2.53.5....3........2....49.....5..1..4.6.

12468 5 246 | 9 34 18 | 7 12 236
3 ...
  Topic: Sudopedia--wings
ronk

Replies: 11
Views: 26474

PostForum: Solving techniques, and terminology   Posted: Sat Nov 24, 2012 2:09 am   Subject: Sudopedia--wings
*--------------------------------------------------*
| 1 28 6 | 9 7 4 | 3 28 5 |
| 258 7 23 | 35 1 6 | 9 4 28 |
| 45 34 9 | 35 8 2 ...
  Topic: Sudopedia: Kraken Fish
ronk

Replies: 8
Views: 23269

PostForum: Solving techniques, and terminology   Posted: Wed Nov 21, 2012 5:04 pm   Subject: Sudopedia: Kraken Fish
Who authored the main article?
  Topic: Sudopedia: Eureka notation
ronk

Replies: 18
Views: 48438

PostForum: Solving techniques, and terminology   Posted: Sat Nov 03, 2012 2:18 am   Subject: Sudopedia: Eureka notation
Help me here:

(3=5)r3c6 says r3c6 is a bivalue cell. Right?

(3-5)r3c6 says what??
That the two candidates share a cell, and we don't know, or even care, if the cell contains other candidates. ...
  Topic: Sudopedia: Eureka notation
ronk

Replies: 18
Views: 48438

PostForum: Solving techniques, and terminology   Posted: Fri Nov 02, 2012 4:37 pm   Subject: Sudopedia: Eureka notation
In addition, ronk would occasionally write discontinuous loops in Eureka notation. Some of his loops started with a weak inference and ended with a weak inference. It was a good way to show that the s ...
  Topic: Eureka help
ronk

Replies: 18
Views: 43729

PostForum: Solving techniques, and terminology   Posted: Thu Nov 01, 2012 12:24 am   Subject: Eureka help
daj95376, I agree your latest illustration is an example of Type 3 coloring, but I don't see where you previously mentioned adding a strong link (6 in r4).
daj95376, I found Angus Johnson's post from ...
  Topic: Another M I
ronk

Replies: 6
Views: 10411

PostForum: Other puzzles   Posted: Wed Oct 31, 2012 10:59 pm   Subject: Another M I
Or, using the UR (AUR?) 28, r14c79:-

3r4c7 = 1r4c79 - r6c89 = (1 - 3)r6c5 = r6c3; r4c1 <> 3

(Yes, I know I should stick the letters UR or AUR in there somewhere, but I haven't yet quite fi ...
  Topic: Eureka help
ronk

Replies: 18
Views: 43729

PostForum: Solving techniques, and terminology   Posted: Wed Oct 31, 2012 2:13 pm   Subject: Eureka help
daj95376, I agree your latest illustration is an example of Type 3 coloring, but I don't see where you previously mentioned adding a strong link (6 in r4).
  Topic: Eureka help
ronk

Replies: 18
Views: 43729

PostForum: Solving techniques, and terminology   Posted: Wed Oct 31, 2012 1:53 am   Subject: Eureka help
Like ronk, I am not seeing stars.
Keith Laughing
Laughing Good one, took me a few seconds to get it though. Good write up too!
  Topic: Eureka help
ronk

Replies: 18
Views: 43729

PostForum: Solving techniques, and terminology   Posted: Tue Oct 30, 2012 11:19 pm   Subject: Re: Eureka help
Have you ever seen the "3rd coloring type/pattern" before without an exclusion, without even a potential one?To me, a "coloring pattern" is independent of whether or not it leads t ...
  Topic: Eureka help
ronk

Replies: 18
Views: 43729

PostForum: Solving techniques, and terminology   Posted: Tue Oct 30, 2012 7:42 pm   Subject: Re: Eureka help

What you have is an example of Angus Johnson's third Coloring pattern. However, he didn't include it in his Simple Sudoku solver, so it's not considered part of the traditional Coloring options.
Ha ...
 
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