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  Topic: June 21 VH
sdq_pete

Replies: 17
Views: 20107

PostForum: Daily Sudoku puzzles   Posted: Mon Jun 21, 2010 11:50 am   Subject: June 21 VH
Yes, I applied the XY-wing quite some way before finishing the basics.
  Topic: May 3 VH
sdq_pete

Replies: 6
Views: 7618

PostForum: Daily Sudoku puzzles   Posted: Mon May 03, 2010 1:29 pm   Subject: May 3 VH
I found a 259 XY wing enough
Peter
  Topic: Aug 11 VH
sdq_pete

Replies: 7
Views: 11087

PostForum: Daily Sudoku puzzles   Posted: Tue Aug 11, 2009 12:34 pm   Subject: Aug 11 VH
There's a column X-wing on 8, though it doesn't help much. For the rest, I too could only see the W-wing.
  Topic: Daily Sudoku:Thu 6-Aug-2009 VH
sdq_pete

Replies: 9
Views: 11753

PostForum: Daily Sudoku puzzles   Posted: Thu Aug 06, 2009 7:33 pm   Subject: Daily Sudoku:Thu 6-Aug-2009 VH
On my first attempt, the puzzle fell apart with simple box line interactions. So I tried again from a different approach and the same thing happened. Have I been twice lucky (or unlucky!) or have othe ...
  Topic: June 25 VH
sdq_pete

Replies: 12
Views: 13898

PostForum: Daily Sudoku puzzles   Posted: Fri Jun 26, 2009 12:42 pm   Subject: June 25 VH
No. This XYZ is unproductive. Any eliminations from an XYZ are always in the same block as the tri-value AND the same row containing the tri-value and the external bi-value. If you follow me. i.e. any ...
  Topic: June 9 VH
sdq_pete

Replies: 7
Views: 10116

PostForum: Daily Sudoku puzzles   Posted: Tue Jun 09, 2009 10:07 am   Subject: June 9 VH
The UR arose about half-way through filling in the basics, so something of a non-issue.

Peter
  Topic: May 17 VH
sdq_pete

Replies: 9
Views: 10254

PostForum: Daily Sudoku puzzles   Posted: Sun May 17, 2009 1:22 pm   Subject: May 17 VH
There's a simple XY on 123 - see R4C4.
Peter
  Topic: April 21 VH
sdq_pete

Replies: 5
Views: 7951

PostForum: Daily Sudoku puzzles   Posted: Tue Apr 21, 2009 3:45 pm   Subject: April 21 VH
After basics, this one was so nearly complete, I just chose a bivalue cell and assumed a value to see whether it lead to a contradiction (which it did) and accordingly filled in the other value... O.K ...
  Topic: April 12 VH
sdq_pete

Replies: 8
Views: 11664

PostForum: Daily Sudoku puzzles   Posted: Sun Apr 12, 2009 4:53 pm   Subject: April 12 VH
Or Rows 6 and 7
Peter
  Topic: Far Too Long Between VHs
sdq_pete

Replies: 11
Views: 14189

PostForum: Daily Sudoku puzzles   Posted: Sat Apr 04, 2009 1:01 pm   Subject: Far Too Long Between VHs
A straightforward one: a single XY (179) finishes it off.
Peter
  Topic: March 25 VH
sdq_pete

Replies: 5
Views: 8687

PostForum: Daily Sudoku puzzles   Posted: Wed Mar 25, 2009 11:24 am   Subject: March 25 VH
I didn't seem to need anything at all until near the end when I came across the W-wing on 23

Peter
  Topic: March 20 VH
sdq_pete

Replies: 15
Views: 20157

PostForum: Daily Sudoku puzzles   Posted: Fri Mar 20, 2009 11:06 am   Subject: March 20 VH
Well, this was my position after basics:

+--------------+-------------+---------------+
| 34 6 1 | 9 7 2 | 35 8 345 |
| 9 24 234 | 1 5 8 | 367 467 347 |
| 8 5 7 ...
  Topic: March 17 VH
sdq_pete

Replies: 7
Views: 10559

PostForum: Daily Sudoku puzzles   Posted: Tue Mar 17, 2009 1:23 pm   Subject: March 17 VH
It was a XY for me. I didn't note it but I think it was 359 with pivot at R4C4.
Peter
  Topic: Very Hard, March 10
sdq_pete

Replies: 8
Views: 10331

PostForum: Daily Sudoku puzzles   Posted: Tue Mar 10, 2009 2:48 pm   Subject: Very Hard, March 10
Yes, X-wing on 8 (which I spotted quite quickly for once) and XY on 389
Peter
  Topic: Feb. 17 VH
sdq_pete

Replies: 5
Views: 9440

PostForum: Daily Sudoku puzzles   Posted: Tue Feb 17, 2009 10:55 am   Subject: Feb. 17 VH
A very quick one, with XY 179 (R7C3)

Peter
  Topic: Jan 17 VH
sdq_pete

Replies: 7
Views: 10293

PostForum: Daily Sudoku puzzles   Posted: Sat Jan 17, 2009 12:07 pm   Subject: Jan 17 VH
ditto!
  Topic: Jan 15 VH
sdq_pete

Replies: 3
Views: 7717

PostForum: Daily Sudoku puzzles   Posted: Thu Jan 15, 2009 7:49 pm   Subject: Jan 15 VH
As a matter of interest, the first thing I came across - which also solved the puzzle in one move - was a W-wing based on the 19's in C23 and eliminating the 9 in R6C3.

Peter
  Topic: Dec 8 VH
sdq_pete

Replies: 8
Views: 14213

PostForum: Daily Sudoku puzzles   Posted: Tue Dec 09, 2008 11:31 am   Subject: Dec 8 VH
I think I shall have to install a keystroke recorder...
Peter
  Topic: Dec 8 VH
sdq_pete

Replies: 8
Views: 14213

PostForum: Daily Sudoku puzzles   Posted: Mon Dec 08, 2008 11:23 am   Subject: Dec 8 VH
Well, for the second time in succession, no advanced techniques at all and very quick (by my standards)...
Peter
  Topic: Dec 5 VH
sdq_pete

Replies: 8
Views: 9986

PostForum: Daily Sudoku puzzles   Posted: Sat Dec 06, 2008 3:54 pm   Subject: Dec 5 VH
Well, Wendy (et al.), on a second look I passed by this stage

+-----------------+----------------+--------------+
| 2389 2379 23789 | 1345 6 2459 | 129 259 145 |
| 239 4 1 | 35 2359 ...
 
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