dailysudoku.com

.-------------------.-----------.---------------.
| 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 ...

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 ...

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 ...

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 ...

#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 ...

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. ...

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 believe "deadly pattern" only applies to the solution, and is to be avoided. A solution here is
+---------+
|1 3 |
| |
| |
+---------+
|2 1 |
| ...

dp
5839r89c238 => 6r9c2; stte
With 4 digits for 3 columns, I suspect this is not valid.

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 ...

*--------------------------------------------------*
| 1 28 6 | 9 7 4 | 3 28 5 |
| 258 7 23 | 35 1 6 | 9 4 28 |
| 45 34 9 | 35 8 2 ...

Who authored the main article?

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. ...

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 ...

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 ...

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 ...

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).

Like ronk, I am not seeing stars.
Keith Laughing

Good one, took me a few seconds to get it though. Good write up too!

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 ...

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 ...