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  Topic: A Menneske, for a change
Myth Jellies

Replies: 9
Views: 5572

PostForum: Other puzzles   Posted: Tue Nov 09, 2010 1:46 am   Subject: A Menneske, for a change
You can also use the UR as a weak inhibiting link for the base digits

(6=27)r6c39 -UR- (27=3)r5c39 - (3=6)r4c7 => r6c7 <> 6

Even useful for those times when you have "solved" ...
  Topic: Law of Leftovers - Request for Help
Myth Jellies

Replies: 4
Views: 25518

PostForum: Daily Sudoku Squiggly puzzles   Posted: Fri Nov 05, 2010 7:45 am   Subject: Law of Leftovers - Request for Help
The Law of Leftovers is really just a way of looking at and using particular type of constraint set very similar to a fish group (such as an x-wing, swordfish, or jellyfish)

Consider a simple x-win ...
  Topic: URs and pseudo cells
Myth Jellies

Replies: 7
Views: 19965

PostForum: Solving techniques, and terminology   Posted: Tue Oct 26, 2010 6:57 am   Subject: URs and pseudo cells
After basics:
After basics and an X-wing on 1:+----------------------+----------------------+----------------------+
| 59 19 56 | 8 7 4 | 2 136 136 |
| 238 ...
  Topic: Is this a valid DP?
Myth Jellies

Replies: 7
Views: 13222

PostForum: Solving techniques, and terminology   Posted: Tue Dec 22, 2009 9:19 am   Subject: Is this a valid DP?
Myth,

Does this pattern still allow me to use strong inferences as needed to prevent a DP?

Assuming I am interpreting your question correctly, the answer is no. Any strong inference is depende ...
  Topic: Is this a valid DP?
Myth Jellies

Replies: 7
Views: 13222

PostForum: Solving techniques, and terminology   Posted: Sun Dec 20, 2009 9:19 am   Subject: Is this a valid DP?

+-------------+-------+-------+
| . . . | . . . | . . . |
| 149 . 149 | . . . | . . . |
| . . . | . . . | . . . |
+-------------+-------+-------+
| . 149 149 | . . . | . . . |
...
  Topic: Puzzle NR 09/11/13 BBDB
Myth Jellies

Replies: 18
Views: 9208

PostForum: Puzzles by daj   Posted: Sat Nov 14, 2009 8:32 am   Subject: Puzzle NR 09/11/13 BBDB
Very creative, Norm Cool Exclamation
  Topic: MM 1573 10-30-09
Myth Jellies

Replies: 6
Views: 5773

PostForum: Other puzzles   Posted: Mon Nov 02, 2009 7:27 am   Subject: MM 1573 10-30-09
Actually, Ted, your deadly pattern is really like a type 6 UR. Note that the sixes are locked in the pattern. Thus if r6c8 was 5 then both of the deadly pattern avoidance cells would have to be 6 an ...
  Topic: MM1540 sep-27-09
Myth Jellies

Replies: 12
Views: 11859

PostForum: Other puzzles   Posted: Sat Oct 03, 2009 7:49 am   Subject: MM1540 sep-27-09
I agree with Asellus; there is no official way to notate, so just get the point across. Sometimes it depends if you have a picture to go with it.

In the case above, with the picture, I would proba ...
  Topic: Unique Rectangles
Myth Jellies

Replies: 38
Views: 90888

PostForum: Solving techniques, and terminology   Posted: Wed Sep 30, 2009 3:20 am   Subject: Unique Rectangles
You've show what is essentially the "naked" patterns associated with URs. There is a whole complementary half of "hidden" patterns based on the question, "Where must the dead ...
  Topic: MM1540 sep-27-09
Myth Jellies

Replies: 12
Views: 11859

PostForum: Other puzzles   Posted: Tue Sep 29, 2009 4:52 pm   Subject: MM1540 sep-27-09

*-----------------------------------------------------------*
| 5 38 367 | 1 37 4 | 6789 689 2 |
| 9 124 1267 | 78 257 28 | 3 46 567 |
| 78 ...
  Topic: Vanhegan Fiendish September 24
Myth Jellies

Replies: 8
Views: 5702

PostForum: Other puzzles   Posted: Fri Sep 25, 2009 8:57 am   Subject: Vanhegan Fiendish September 24
*-----------------------------------------------------------*
| 7 246 1234 | 1346 36 9 | 236 8 5 |
| 139 269 123 | 136 8 5 | 236 4 7 |
| 34 ...
  Topic: MM 1517 & 1519
Myth Jellies

Replies: 9
Views: 6188

PostForum: Other puzzles   Posted: Thu Sep 10, 2009 8:21 pm   Subject: MM 1517 & 1519
could you also express it like this?
MUG479

That would be confusing. The MUG only forces either a 2 or a 6, but not necessarily both to be true (just like a UR). Thus you have a strong link betw ...
  Topic: MM 1517 & 1519
Myth Jellies

Replies: 9
Views: 6188

PostForum: Other puzzles   Posted: Thu Sep 10, 2009 5:08 pm   Subject: MM 1517 & 1519
1517: After a skyscraper on 2:+-------------------+--------------------+-------------------+
| 5 *479 8 | 27 *479+26 69 | 24 3 1 |
| 3 *49 2 | 1 *49 5 ...
  Topic: AICs vs. Forcing Chains
Myth Jellies

Replies: 6
Views: 17351

PostForum: Solving techniques, and terminology   Posted: Mon Sep 07, 2009 3:23 am   Subject: AICs vs. Forcing Chains
...do you have an example where the value in the ERI cell is eliminated in a AIC loop?

Not for a normal sudoku. The reason for that is there is always a shorter and usually simpler discontinuous A ...
  Topic: Menneske Super Hard (56)
Myth Jellies

Replies: 6
Views: 5259

PostForum: Other puzzles   Posted: Sat Jul 25, 2009 8:18 am   Subject: Menneske Super Hard (56)
Not to take anything away from Norm's solution path, which was genius, but here is a little hint I have found that may help the more mortal among us.

When evaluating a UR, if you find yourself cons ...
  Topic: AICs vs. Forcing Chains
Myth Jellies

Replies: 6
Views: 17351

PostForum: Solving techniques, and terminology   Posted: Fri Jul 24, 2009 6:36 am   Subject: AICs vs. Forcing Chains
The issue is that when you describe an AIC construct via a forcing chain, you give the very natural impression that you plugged in one truth value and followed its implications along, then you plugged ...
  Topic: AICs vs. Forcing Chains
Myth Jellies

Replies: 6
Views: 17351

PostForum: Solving techniques, and terminology   Posted: Thu Jul 23, 2009 7:35 am   Subject: AICs vs. Forcing Chains
Idea The difference lies not in what is discovered, but how it is discovered.

An AIC is a meta-pattern.

I can find an AIC by finding sub-patterns.

These sub-patterns (bivalued cells, bilo ...
  Topic: Outlaw puzzle from Paul's Pages
Myth Jellies

Replies: 12
Views: 9287

PostForum: Other puzzles   Posted: Fri Oct 10, 2008 10:09 pm   Subject: Outlaw puzzle from Paul's Pages
Hereís another question for anyone out there. See the two 5ís in C4. The bottom one uses the ER hinge in Box6 to remove the 5v from R1C6. The top one leaves the 5a in R1C2 which also removes the 5v. N ...
  Topic: LA Times / Freep - July 11, 2008
Myth Jellies

Replies: 10
Views: 8522

PostForum: Other puzzles   Posted: Sat Jul 12, 2008 8:16 am   Subject: LA Times / Freep - July 11, 2008
*-----------*
|...|.49|.6.|
|..4|.3.|...|
|.56|...|.2.|
|---+---+---|
|9..|87.|...|
|...|3.5|...|
|7..|.91|8.5|
|---+---+---|
|.2.|...|94.|
|...|...|1..|
|.8.|41.|...|
*------- ...
  Topic: Menneske SH like VH
Myth Jellies

Replies: 5
Views: 6449

PostForum: Other puzzles   Posted: Fri Jun 27, 2008 7:36 am   Subject: Menneske SH like VH
(sigh) once again, people start finding these patterns more effectively than I ever could. Time to go invent a new one I guess.

Nice catch, Ravel.
 
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