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  Topic: Aug 28 VH
kragzy

Replies: 2
Views: 4685

PostForum: Daily Sudoku puzzles   Posted: Tue Aug 30, 2011 12:15 am   Subject: Aug 28 VH
Also a 679 XY wing pivoted in R3C9 eliminating 7 in R1C2 solves it.
  Topic: 30 June VH
kragzy

Replies: 6
Views: 6787

PostForum: Daily Sudoku puzzles   Posted: Wed Jun 29, 2011 11:11 pm   Subject: 30 June VH
I lost track of the number of XY wings I used to 'clean up' this puzzle before finding the one that cracked it (a 134 pivoted in R6C6). In terms of VH techniques, this was about a 5 stepper for me. I' ...
  Topic: Jun 21 VH
kragzy

Replies: 6
Views: 9839

PostForum: Daily Sudoku puzzles   Posted: Wed Jun 22, 2011 1:29 am   Subject: Jun 21 VH
Ahhhhhhhhhhhhhhhhhhhhhhh.

Thanks Marty
  Topic: Jun 21 VH
kragzy

Replies: 6
Views: 9839

PostForum: Daily Sudoku puzzles   Posted: Wed Jun 22, 2011 12:51 am   Subject: Jun 21 VH
Sorry, I'll try copying the grid again.


+--------------+----------+------------------+
| 17 37 6 | 89 24 5 | 1349 1237 134789 |
| 157 9 8 | 6 24 3 | 145 127 147 |
| 2 4 3 ...
  Topic: Jun 21 VH
kragzy

Replies: 6
Views: 9839

PostForum: Daily Sudoku puzzles   Posted: Wed Jun 22, 2011 12:51 am   Subject: Jun 21 VH
I must be missing something here. I saw the first two XY wings mentioned by Clement, which gave me the following grid.

[code]
+--------------+----------+------------------+
| 17 37 6 | 89 24 ...
  Topic: May 10 VH
kragzy

Replies: 15
Views: 18141

PostForum: Daily Sudoku puzzles   Posted: Thu May 12, 2011 11:07 pm   Subject: May 10 VH
I certainly wasn't complaining. I enjoy a challenging puzzle. It was just that on this occasion, I thought I was blind to the obvious (which often happens!). As it turned out, I was not alone. Phew - ...
  Topic: May 10 VH
kragzy

Replies: 15
Views: 18141

PostForum: Daily Sudoku puzzles   Posted: Thu May 12, 2011 4:38 am   Subject: May 10 VH
I am relieved to read the comments above! I've just solved this one and thought I was making an absolute dog's breakfast of it. As it happened I went down the X wing, XYZ wing, XY wing path - but is w ...
  Topic: Pi Day Hard
kragzy

Replies: 2
Views: 5127

PostForum: Daily Sudoku puzzles   Posted: Mon Mar 14, 2011 10:10 pm   Subject: Pi Day Hard
The same naked triple occurs in Box 2 - with the same result.
  Topic: Feb 21 VH
kragzy

Replies: 3
Views: 5261

PostForum: Daily Sudoku puzzles   Posted: Sun Feb 20, 2011 10:55 pm   Subject: Feb 21 VH
A five minute puzzle that almost solved itself. Very few unsolved cells after basics, needing a a 246 XY wing to clinch it.
  Topic: Nov 23 VH
kragzy

Replies: 13
Views: 12274

PostForum: Daily Sudoku puzzles   Posted: Tue Nov 23, 2010 1:20 am   Subject: Nov 23 VH
Two steps for me: 258 XYZ wing centred on R8C3 which opens up a 578 XY wing centred on R9C3.
  Topic: Nov 16 VH
kragzy

Replies: 4
Views: 5136

PostForum: Daily Sudoku puzzles   Posted: Mon Nov 15, 2010 10:17 pm   Subject: Nov 16 VH
If you start in the top left corner on your search for XY wings, you'll solve it in a flash.
  Topic: Oct 6 VH
kragzy

Replies: 6
Views: 6090

PostForum: Daily Sudoku puzzles   Posted: Tue Oct 05, 2010 11:05 pm   Subject: Oct 6 VH
Also a 468 XY wing centred on R1C4 provides a solution. Since after basics this puzzle comprises only 1s, 4s, 6s, and 8s, I suspect that there are several solutions. I'll leave it to others to find th ...
  Topic: Jul 28 VH
kragzy

Replies: 6
Views: 7132

PostForum: Daily Sudoku puzzles   Posted: Wed Jul 28, 2010 11:39 pm   Subject: Jul 28 VH
The puzzle for a particular day becomes available according to local time. The time stamps are GMT, I think (or is that called UTC these days?).

Clement, in Tanzania, must do the puzzle shortly aft ...
  Topic: Jul 18 VH
kragzy

Replies: 10
Views: 8882

PostForum: Daily Sudoku puzzles   Posted: Tue Jul 20, 2010 2:27 am   Subject: Jul 18 VH
I just did this puzzle (a little late) and went to the forum expecting to see complaints about how easy it was.

Looking at Keith's 'after basics' grid, there is a one step 158 XY wing pivoted on r9 ...
  Topic: June 21 VH
kragzy

Replies: 17
Views: 18952

PostForum: Daily Sudoku puzzles   Posted: Mon Jun 21, 2010 12:21 am   Subject: June 21 VH
The shortest day on this side of the globe, and the longest puzzle, for me at least. Look carefully for hidden pairs in this messy puzzle. I missed one and wasted at least 30 minutes searching for 'ad ...
  Topic: Feb 16 VH
kragzy

Replies: 12
Views: 12251

PostForum: Daily Sudoku puzzles   Posted: Wed Feb 17, 2010 1:28 am   Subject: Feb 16 VH
Thanks Marty. The other mistake I made was saying that R6C3 becomes the pincer. It's actually the pivot. Not the computer, not my typing, just a fuzzy brain Confused (smiley intended!)
  Topic: Feb 16 VH
kragzy

Replies: 12
Views: 12251

PostForum: Daily Sudoku puzzles   Posted: Wed Feb 17, 2010 12:04 am   Subject: Feb 16 VH
That smiley should be '8'. Don't know how that happened; must be the computer, couldn't possibly be my typing skills!
  Topic: Feb 16 VH
kragzy

Replies: 12
Views: 12251

PostForum: Daily Sudoku puzzles   Posted: Wed Feb 17, 2010 12:00 am   Subject: Feb 16 VH
Are you referring to:
r4c3 (A), r4c5 (*), r6c3 (B), r6c6 (C)?
Must the XY Wing (679) removes the common digit '7' from r4c5?


Hi Ema,

You're correct but you're not quite there yet. There i ...
  Topic: Feb 16 VH
kragzy

Replies: 12
Views: 12251

PostForum: Daily Sudoku puzzles   Posted: Mon Feb 15, 2010 11:14 pm   Subject: Feb 16 VH
And there's a good ol' XY wing (679) for those of us who, for no particular reason, prefer to avoid uniqueness solutions.
  Topic: Feb 14 VH
kragzy

Replies: 12
Views: 10416

PostForum: Daily Sudoku puzzles   Posted: Mon Feb 15, 2010 3:33 am   Subject: Feb 14 VH
Thanks Wendy. Rolling Eyes
 
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