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  Topic: 2 Chain Logic Rules with Examples
Bud

Replies: 6
Views: 17330

PostForum: Solving techniques, and terminology   Posted: Mon Aug 08, 2011 1:28 pm   Subject: 2 Chain Logic Rules with Examples
Example 2. Chains start at conjugate.

300270005004006000050000000200004093900000006030100008003000020000300500600081937

After making basic moves the puzzle is as shown in the diagram. In this e ...
  Topic: 2 Chain Logic Rules with Examples
Bud

Replies: 6
Views: 17330

PostForum: Solving techniques, and terminology   Posted: Mon Aug 08, 2011 1:18 pm   Subject: 2 Chain Logic Rules with Examples
2 Chain Logic Rules

I am a big fan of 2-chain logic, primarily because it can result in a lot of cell eliminations. It can also result in forcing but that topic is well covered in all of the solv ...
  Topic: Conjugate-Linked ALS's plus Extended Purple Cow Example
Bud

Replies: 0
Views: 10353

PostForum: Solving techniques, and terminology   Posted: Tue Jun 21, 2011 11:42 pm   Subject: Conjugate-Linked ALS's plus Extended Purple Cow Example
000400150001095040005012030009000004000526000800000600070100400000050700013008000

After making basic moves the puzzle is as shown in the diagram. At this point I look for the most powerful advance ...
  Topic: Conjugate-Linked ALS's with 5 eliminations
Bud

Replies: 17
Views: 32400

PostForum: Solving techniques, and terminology   Posted: Wed Jun 15, 2011 11:55 am   Subject: Conjugate-Linked ALS's with 5 eliminations
Thanks Don,
I learned a lot about ALS's from your tutorial. Also thanks to everyone else for your helpful comments.
  Topic: Conjugate-Linked ALS's with 5 eliminations
Bud

Replies: 17
Views: 32400

PostForum: Solving techniques, and terminology   Posted: Tue Jun 14, 2011 1:03 pm   Subject: Conjugate-Linked ALS's with 5 eliminations
Hi Paul,
First of all, let me say that Allan Barker initiated the Death Blossom. I have been able to contact him in the past to ask questions at his site Sudokuone.com and he is very gracious about ...
  Topic: Conjugate-Linked ALS's with 5 eliminations
Bud

Replies: 17
Views: 32400

PostForum: Solving techniques, and terminology   Posted: Wed Jun 08, 2011 12:06 pm   Subject: Conjugate-Linked ALS's with 5 eliminations
I apologize Ron, My Bad. I now clearly see that the conjugate linkage is redundant. So your way is better. I will say that this is the most powerful singly-linked ALS-XZ I have ever seen. Because ...
  Topic: Conjugate-Linked ALS's with 5 eliminations
Bud

Replies: 17
Views: 32400

PostForum: Solving techniques, and terminology   Posted: Tue Jun 07, 2011 12:13 pm   Subject: Conjugate-Linked ALS's with 5 eliminations
Thanks for your reply Ron. I still think that 1 move is better than 2 but I respect your opinion. In a sense, the conjugate linked ALS's are quasi or psuedo ALS-XZ's since the 2 ALS's have the same ...
  Topic: Conjugate-Linked ALS's with 5 eliminations
Bud

Replies: 17
Views: 32400

PostForum: Solving techniques, and terminology   Posted: Mon Jun 06, 2011 7:26 pm   Subject: Conjugate-Linked ALS's with 5 eliminations
200041000306000500000500090021000000040126080000000200070008000002000703000470806

After basic moves the puzzle is as shown in the diagram. The 2 ALS's are labeled A and B in Box 1 and 3. The 1 gr ...
  Topic: Death Blossom with 2 digit eliminations
Bud

Replies: 2
Views: 14731

PostForum: Solving techniques, and terminology   Posted: Sat Jun 04, 2011 6:45 pm   Subject: Death Blossom with 2 digit eliminations
Good moves Ron. I could argue that 1 move is better than 2, but that is a matter of opinion. Actually the ALS-XZ I was originally looking at was (1459)r2c578 and (249)r8c38, rcd=9.
  Topic: Death Blossom with 2 digit eliminations
Bud

Replies: 2
Views: 14731

PostForum: Solving techniques, and terminology   Posted: Sat Jun 04, 2011 3:26 pm   Subject: Death Blossom with 2 digit eliminations
083000070200300008000009060000070630001000900030060000070200000800005006090000140

After a single basic move the puzzle is as shown in the diagram below. The pivot for the death blossom is labeled ...
  Topic: Almost Hidden XY-Ring (loop) Example
Bud

Replies: 0
Views: 9674

PostForum: Solving techniques, and terminology   Posted: Fri Apr 22, 2011 1:12 pm   Subject: Almost Hidden XY-Ring (loop) Example
000000200500800610100004000001690003007083900200047006005300008012008007006000000

After making basic moves the puzzle is as shown in the diagram below. The 4 cells in the almost hidden XY-Ring iar ...
  Topic: ER Multidigit Extension Example
Bud

Replies: 6
Views: 13175

PostForum: Solving techniques, and terminology   Posted: Sun Mar 06, 2011 10:58 pm   Subject: ER Multidigit Extension Example
Hi DAJ aqnd Asellus.
Asellus, the relationship between the two eliminations is that they are both dependent on the fact that r7c2 inclusive-or r6c9 = 9. If this were not true, neither elimination ca ...
  Topic: ER Multidigit Extension Example
Bud

Replies: 6
Views: 13175

PostForum: Solving techniques, and terminology   Posted: Fri Mar 04, 2011 7:40 pm   Subject: ER Multidigit Extension Example
000002090070000504050009000004290080600030002020070100000800050501920060080400000

After basic moves the puzzle is as shown in the diagram below. The 9 ER cells are marked with * and the 156 extens ...
  Topic: Not Quite Multidigit X-Wing (Extended) Example
Bud

Replies: 1
Views: 8973

PostForum: Solving techniques, and terminology   Posted: Sat Feb 26, 2011 5:34 pm   Subject: Not Quite Multidigit X-Wing (Extended) Example
I have found several examples of this technique and not all of them are extended. A multidigit X-Wing consist of 4 cells with 4 conjugate digits. This basic technique uses 4 cells with 3 conjugate di ...
  Topic: Discontinuous NL/Hidden Continuous NL Pattern
Bud

Replies: 4
Views: 9939

PostForum: Solving techniques, and terminology   Posted: Fri Nov 19, 2010 12:35 am   Subject: Discontinuous NL/Hidden Continuous NL Pattern
After reviewing my notes I had listed the candidates in r1c6 as 24 rather than 247 which means that this post is wrong. This is why you can't find the CNL, Ron. I apologize for this and would like t ...
  Topic: Discontinuous NL/Hidden Continuous NL Pattern
Bud

Replies: 4
Views: 9939

PostForum: Solving techniques, and terminology   Posted: Thu Nov 18, 2010 5:32 pm   Subject: Discontinuous NL/Hidden Continuous NL Pattern
Some time ago, I gave an example of a 2 digit discontinuous NL pattern(S-Wing) which is also a 3 digit continuous NL. This example illustrates that the inverse can also be true. In this case a 3 dig ...
  Topic: Extended S-Wing w/2 digit elimination
Bud

Replies: 2
Views: 8494

PostForum: Solving techniques, and terminology   Posted: Wed Nov 03, 2010 12:39 pm   Subject: Extended S-Wing w/2 digit elimination
Hi keith,
Here is the original puzzle with no basic moves. I will try to include this with any future posts.

+----------------------+---------------------+------------------------+
| 348 9 ...
  Topic: Extended S-Wing w/2 digit elimination
Bud

Replies: 2
Views: 8494

PostForum: Solving techniques, and terminology   Posted: Tue Nov 02, 2010 12:14 am   Subject: Extended S-Wing w/2 digit elimination
The cells in a 23 S-Wing are labeled *. The extension is labeled #.
The pivot at r8c3 results in either r3c1=2 or r5c1 =3 and r1c1=4. This => that r3c1<>34.

Extended S-Wing Example
...
  Topic: Extended M-Ring Example
Bud

Replies: 1
Views: 7043

PostForum: Solving techniques, and terminology   Posted: Thu Oct 21, 2010 6:50 pm   Subject: Extended M-Ring Example
The extended M-Ring in the example has forcing path cells denoted by *. These paths are: (2)r3c7-r9c7=(2)r9c5 and (8)r3c7-r13c9=(8)r7c9-r9c78=(8)r9c5. This proves that r3c7=r9c5 = 28 => r3c7<& ...
  Topic: Potential deletions for general loops
Bud

Replies: 5
Views: 9544

PostForum: Solving techniques, and terminology   Posted: Mon Oct 18, 2010 12:25 am   Subject: Potential deletions for general loops
Hi Ted,
If you are having trouble finding more information on this it could be because you are using the wrong terminology. The correct terminology is continuous nice loop, which is often called con ...
 
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