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  Topic: Oct 3
George Woods

Replies: 2
Views: 6451

PostForum: Daily Sudoku puzzles   Posted: Thu Oct 04, 2018 5:46 pm   Subject: Oct 3
No Comment on this one yet!

I did it via an X wing on 6s, followed shortly afterwards by an XY wing 279
making r3c3 6 and stte
  Topic: July 29 V hard ????
George Woods

Replies: 0
Views: 5248

PostForum: Daily Sudoku puzzles   Posted: Sun Jul 29, 2018 9:49 am   Subject: July 29 V hard ????
only fundamentals needed - and even draw/play played elementary moves until it changed rating from v hard to hard!!
  Topic: 4 July VH
George Woods

Replies: 2
Views: 5829

PostForum: Daily Sudoku puzzles   Posted: Wed Jul 04, 2018 2:48 pm   Subject: 4 July VH
I did this twice to check it needed fundamental only
  Topic: May 31 VH
George Woods

Replies: 1
Views: 4746

PostForum: Daily Sudoku puzzles   Posted: Thu May 31, 2018 1:11 pm   Subject: was it a Very HARD?
I did it once with nothing but fundamentals - thought I had made a lucky mistake so did it again with nothng but fundamentals

so why? why?

Mea Culpa I did make the same unjustified entry twice ...
  Topic: Apr 14 VH
George Woods

Replies: 8
Views: 11961

PostForum: Daily Sudoku puzzles   Posted: Mon Apr 16, 2018 2:46 pm   Subject: Apr 14 VH
The 356 is exactly the same as clement's except it can be extended since if r4c6 is 6 then r2c4 is 6 so the xy wing (with extension) takes out all the 6 in col4 of box 2
  Topic: Apr 14 VH
George Woods

Replies: 8
Views: 11961

PostForum: Daily Sudoku puzzles   Posted: Sun Apr 15, 2018 11:38 am   Subject: w wing solution
356 and the result of the extension is exactly the same as Clement's solution
since the 6''s confined to col 5 in box 8 give the same solution i.e r3c5=9
  Topic: Apr 14 VH
George Woods

Replies: 8
Views: 11961

PostForum: Daily Sudoku puzzles   Posted: Sat Apr 14, 2018 1:22 pm   Subject: 356 wing
Your use of the wing Clement sets r9c6 to not 6 But the wing at r4c6 can be extended (by 56s) to r2c4 so r3c5 becomes 9 and thereafter solution is easy
  Topic: Apr 1 VH
George Woods

Replies: 2
Views: 5964

PostForum: Daily Sudoku puzzles   Posted: Mon Apr 02, 2018 11:07 am   Subject: Traditinal XY wing
Don't know why no postings until today BUT
XY 467 pivoted at r4c5 so r2c4 not 4 so 3
  Topic: Jan 19 VH
George Woods

Replies: 4
Views: 8926

PostForum: Daily Sudoku puzzles   Posted: Fri Jan 19, 2018 2:32 pm   Subject: Is this the same as colouring?
Marty
I did it by noting the 3 connected 37, so if the one at r2c3 is 7 then r6c8 is also 7 and block 3 has nowhere for a 7 so r2c3 must be 3 stte
  Topic: Sat 11 VH w wing solution
George Woods

Replies: 4
Views: 7113

PostForum: Daily Sudoku puzzles   Posted: Sun Nov 12, 2017 1:27 pm   Subject: Sat 11 VH w wing solution
I'm getting senile. I thought I posted last night but I don't see it.
W-Wing (79) in b26, SL 9 in c7, with pincer transport=> -7r2c3.


+------------+--------------+--------------+
| 2 3 4 ...
  Topic: Sat 11 VH w wing solution
George Woods

Replies: 4
Views: 7113

PostForum: Daily Sudoku puzzles   Posted: Sat Nov 11, 2017 8:30 am   Subject: Sat 11 VH w wing solution
[code]
+---------------+----------------+---------------+
| 2 3 469 | 45689 489 4589 | 7 489 1 |
| 67 8 4679 | 1 2 479 | 349 5 39 |
| 17 147 5 | 3 489 4789 | 6 ...
  Topic: Oct. 6 VH
George Woods

Replies: 11
Views: 13934

PostForum: Daily Sudoku puzzles   Posted: Fri Oct 06, 2017 1:22 pm   Subject: Is this the same as a skyscraper?
A 4 in r1c3 immediately leads to a 4 in r2c8 which leaves row 5 destitute of 4s! so r1c3 cannot be 4 ...ste
  Topic: Oct 4 VH
George Woods

Replies: 3
Views: 6177

PostForum: Daily Sudoku puzzles   Posted: Wed Oct 04, 2017 11:20 am   Subject: Oct 4 VH
tyhe xyz wing 457 r2c5 andr9c56 takes out the 5s in c5r78 So r9c2 becomes 4 ...ste
  Topic: Aug 25 VH
George Woods

Replies: 2
Views: 6333

PostForum: Daily Sudoku puzzles   Posted: Fri Aug 25, 2017 5:36 pm   Subject: basics only
perhaps once again the software may have used an Xwing in 4s col 5 and 7 which is so obvious that it hardly counts as an advanced move. OK I am not sure whether it is needed to solve the puzzle
  Topic: May 29 VH
George Woods

Replies: 2
Views: 4147

PostForum: Daily Sudoku puzzles   Posted: Mon May 29, 2017 9:27 am   Subject: yet another solution
If r3c9 is not 4 we immediately get two 1s in block 1 so r3c9 must be 4 and this solves the puzzle
  Topic: May 27 VH
George Woods

Replies: 7
Views: 7441

PostForum: Daily Sudoku puzzles   Posted: Sat May 27, 2017 1:13 pm   Subject: May 27 VH
Sorry I got it wrong I meant r1c8 not r1c7 for one wing that becomes 2 if r6c8 is 8 whilst if r6c8 is 7 then r6c3 becomes 29 so that is equivalen to a wing being 2 since it denies a 2 o r1c3
  Topic: May 27 VH
George Woods

Replies: 7
Views: 7441

PostForum: Daily Sudoku puzzles   Posted: Sat May 27, 2017 10:47 am   Subject: Almost an XY wing
The pivot at r6c8 denies a 2 to r1c3 either via r1c8 or the pair of 29 at r56c3 so it is a kind of xy wing according to its mechanics but not apure XY I wonder what it is called a compound XY wing?
  Topic: April 29 VH
George Woods

Replies: 4
Views: 5362

PostForum: Daily Sudoku puzzles   Posted: Sat Apr 29, 2017 7:00 am   Subject: XY solution
Can't imagine that you of all people missed the XY wing 367 pivot r4c1
  Topic: april 21 V Hard
George Woods

Replies: 3
Views: 6043

PostForum: Daily Sudoku puzzles   Posted: Fri Apr 21, 2017 11:06 am   Subject: april 21 V Hard
Surprised nobody contributed yet

I could only find a W Wing 12 operating on 2s in col 2 so r3c1 becomes 1 stte

Looking again I find that the W Wing is available immediately and sets r3c1 to 1 wh ...
  Topic: April 19 VH
George Woods

Replies: 2
Views: 4949

PostForum: Daily Sudoku puzzles   Posted: Wed Apr 19, 2017 12:17 pm   Subject: Not my task to give first solution!
Xwing on 5 cols 5,9 opens up xy wing 567 pivot r4c9 so r5c7 is 7 stte
 
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