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  Topic: Rambling: DP ???
Steve R

Replies: 4
Views: 7444

PostForum: Puzzles by daj   Posted: Thu Dec 23, 2010 3:26 pm   Subject: Rambling: DP ???
Danny

Resist the temptation!

All the graves I have seen, whether universal or light, bi- or multi-valent, share two characteristics. They imply that the pattern has no solution or gives rise to ...
  Topic: Law of Leftovers - Request for Help
Steve R

Replies: 4
Views: 33818

PostForum: Daily Sudoku Squiggly puzzles   Posted: Wed Oct 27, 2010 12:28 pm   Subject: Law of Leftovers - Request for Help
I think http://www.sudopedia.org/wiki/Law_of_Leftovers sets out pretty much all there is to the logic.

Steve
  Topic: October 18, 2006 monster--boy, is it ever!
Steve R

Replies: 1
Views: 20865

PostForum: Daily Sudoku Monster puzzles   Posted: Sun Oct 17, 2010 7:19 pm   Subject: October 18, 2006 monster--boy, is it ever!
Hi, unitron.

The puzzle has just one solution but to find it you need to watch out for a pair at the bottom of the second column.

Steve
  Topic: Difficult puzzle
Steve R

Replies: 2
Views: 7487

PostForum: Other puzzles   Posted: Thu Jun 03, 2010 1:54 pm   Subject: Difficult puzzle
You can place 3 in r8c2 using the contradiction:

r8c2 ≠3 => r8c1 = 3 => r4c1 ≠ 3 => r4c6 = 3 => r4c3 =1 => r5c2 =7 => r9c2 = 1 => r6c2 =5 => r8c2 = 3.

This gi ...
  Topic: Local Paper Puzzle
Steve R

Replies: 12
Views: 18195

PostForum: Other puzzles   Posted: Sat May 15, 2010 12:26 pm   Subject: Local Paper Puzzle
MM

Itís of minimal interest but, for what itís worth, I also got straight to Leoís grid in the very first post with its conjugates for 2 in column 7.

Steve
  Topic: Local Paper Puzzle
Steve R

Replies: 12
Views: 18195

PostForum: Other puzzles   Posted: Fri May 14, 2010 8:26 pm   Subject: Local Paper Puzzle
Kathyís neat W-wing does the trick all on its own.

Steve
  Topic: April 16 VH
Steve R

Replies: 18
Views: 25046

PostForum: Daily Sudoku puzzles   Posted: Fri Apr 16, 2010 1:55 pm   Subject: April 16 VH
*----------------------------------------------------------------*
| 1 5 6 | 9 3 4 | 7 8 2 |
| 2 3 79 | 78 1 678 | 5 4 ...
  Topic: March 13 DB
Steve R

Replies: 13
Views: 14830

PostForum: Other puzzles   Posted: Mon Mar 15, 2010 7:13 pm   Subject: March 13 DB
Keithís grid may be written as:

+----------------+------------------+----------------+
| 8 5 6 | 24 14 9 | 7 3 12 |
| 7 2 1 | 3 6 8 | 5 4 9 ...
  Topic: Squiggly VH July 6, 2009
Steve R

Replies: 3
Views: 28901

PostForum: Daily Sudoku Squiggly puzzles   Posted: Sun Nov 22, 2009 8:33 pm   Subject: Squiggly VH July 6, 2009
It's usually called "box-line interaction," just as in classical SuDoku.

Steve
  Topic: Squiggly VH July 6, 2009
Steve R

Replies: 3
Views: 28901

PostForum: Daily Sudoku Squiggly puzzles   Posted: Fri Nov 20, 2009 6:03 pm   Subject: Squiggly VH July 6, 2009
I think I can.

If you run your eye along row 5 you will find it intersects five boxes. Letís call them A, B, C, D and E from left to right.

Now, your diagram makes it clear that 1 occupies row 5 ...
  Topic: Oct 3 DB
Steve R

Replies: 5
Views: 7836

PostForum: Other puzzles   Posted: Sun Oct 04, 2009 3:22 pm   Subject: Oct 3 DB
The puzzle can also be solved using the swordfish for 9 in rows 2, 4 and 7:

*-----------------------------------------------------------*
| 67 67 29 | 4 19 8 | 5 3 ...
  Topic: Vanhegan Fiendish September 27
Steve R

Replies: 9
Views: 11009

PostForum: Other puzzles   Posted: Sun Sep 27, 2009 9:17 pm   Subject: Vanhegan Fiendish September 27
In traditional style the implication snippet would be:

r4c9 ≠ 6 => r78c9 = (16) => r8c2 = 4

This looks OK to me.

Steve
  Topic: 9-11
Steve R

Replies: 2
Views: 8802

PostForum: Daily Sudoku puzzles   Posted: Sat Sep 12, 2009 10:17 am   Subject: 9-11
Itís good to hear from you, rihiter

+-------+-------+-------+
| . . . | . 7 . | 2 3 . |
| . . . | 3 . 9 | . . 7 |
| 3 7 6 | 1 2 4 | 8 9 5 |
+-------+-------+-------+
| 7 . . | 4 . . | 1 . ...
  Topic: 24-Jul-2009 puzzle
Steve R

Replies: 1
Views: 22871

PostForum: Daily Sudoku Monster puzzles   Posted: Wed Aug 05, 2009 4:42 pm   Subject: 24-Jul-2009 puzzle
Nice to hear from you, mieblanc!

As to a hint: there is only one place for E in box 15.

Best wishes

Steve
  Topic: July 12 BrainBashers
Steve R

Replies: 4
Views: 6621

PostForum: Other puzzles   Posted: Mon Jul 13, 2009 11:37 am   Subject: July 12 BrainBashers
Ted, I think you may have overlooked a W-Wing.

+-------------------------------------+
| 459 579 1 | 6 47 2 | 3 89 78 |
| 349 279 346 | 48 5 78 | 24 19 167 |
| 8 27 46 | 3 9 1 | ...
  Topic: Nothing here that I hate!
Steve R

Replies: 6
Views: 8379

PostForum: Other puzzles   Posted: Tue Jul 07, 2009 11:21 am   Subject: Nothing here that I hate!
At this stage

+------------------------------------------------+
| 3 4 7 | 159 6 8 | 19 2 15 |
| 58 1 9 | 2 4 Ü35 | 7 Ü38 6 |
| 6 2 58 | 1359 *13 ...
  Topic: MM 1351 march 22
Steve R

Replies: 7
Views: 11303

PostForum: Other puzzles   Posted: Sun Mar 29, 2009 8:45 pm   Subject: MM 1351 march 22
Keith referred to an XYZ-wing 56-9.

I suspect this is pivoted on r3c9 and does the trick.

Steve
  Topic: help with this game
Steve R

Replies: 1
Views: 6185

PostForum: Other puzzles   Posted: Mon Mar 02, 2009 5:25 pm   Subject: help with this game
+----------+--------------+----------------+
| 6 9 4 | 5 23 7 | 28 238 1 |
| 12 12 3 | 8 46 9 | 5 46 7 |
| 5 8 7 | 36 1 2346 | 26 9 2346 |
+----------+ ...
  Topic: March 2 VH
Steve R

Replies: 4
Views: 11764

PostForum: Daily Sudoku puzzles   Posted: Mon Mar 02, 2009 12:49 pm   Subject: March 2 VH
crunched

Thatís the flightless wing. To take off, check the possibilities for 2 in rows 4 and 9.

Steve
  Topic: MM 1321 2/20/09
Steve R

Replies: 4
Views: 8913

PostForum: Other puzzles   Posted: Sat Feb 28, 2009 1:43 pm   Subject: MM 1321 2/20/09
The grid is riddled with a bewildering number of deadly patterns so itís easy to miss the most helpful.

To avoid a (567) in r456c19, 2 must be placed in r4c1 and singles follow.

Steve
 
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