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  Topic: Learning W-Wings
leocar

Replies: 11
Views: 169344

PostForum: Solving techniques, and terminology   Posted: Mon Aug 08, 2022 10:33 pm   Subject: Learning W-Wings

+------------+----------+----------+
| 28 1 3 | 28 7 5 | 9 4 6 |
| 49 7 2489 | 3 89 6 | 1 28 5 |
| 6 5 289 | 289 1 4 | 3 7 28 |
+------------+----------+----------+
| 49 3 ...
  Topic: Learning W-Wings
leocar

Replies: 11
Views: 169344

PostForum: Solving techniques, and terminology   Posted: Thu Jun 30, 2022 3:01 am   Subject: Learning W-Wings
Hi, while I was waiting for another VH, I looked at one from a few years back (I think it was from Tue 3-Jun-2014). After completing a X-Y wing I was left with the puzzle below which is graded hard. ...
  Topic: Learning W-Wings
leocar

Replies: 11
Views: 169344

PostForum: Solving techniques, and terminology   Posted: Thu Jun 16, 2022 10:41 pm   Subject: Learning W-Wings
Thank you both for the replies. It has helped me understand the method better as well as proving it and having another potential solving method.
  Topic: Learning W-Wings
leocar

Replies: 11
Views: 169344

PostForum: Solving techniques, and terminology   Posted: Thu Jun 16, 2022 3:17 am   Subject: Learning W-Wings
Hi, I'm learning how to find and use W-Wings. Today's daily sudoku (16/06/2022) I think may have had one even though it has nothing to do with solving the puzzle. Can someone please let me know if I h ...
  Topic: Sudoku book puzzle
leocar

Replies: 2
Views: 15367

PostForum: Other puzzles   Posted: Thu Jan 02, 2014 2:39 am   Subject: Sudoku book puzzle
Thanks, thought the solution wasn't too difficult, just couldn't see it.
  Topic: Sudoku book puzzle
leocar

Replies: 2
Views: 15367

PostForum: Other puzzles   Posted: Thu Jan 02, 2014 12:34 am   Subject: Sudoku book puzzle
Hi, I'm stuck on the puzzle below in my Sudoku book. Can anyone help me please. Thanks

Leo




+-----------+-------------+--------------+
| 6 1 9 | 2 5 38 | 38 7 4 |
| 7 5 8 ...
  Topic: Difficult puzzle
leocar

Replies: 2
Views: 14905

PostForum: Other puzzles   Posted: Thu Jun 03, 2010 9:25 am   Subject: Difficult puzzle
Hi, I came across this puzzle but got stuck very early. Can someone please help me with the next step as I am at a loss. Thank you.
Leo



+----------------+-------------+----------------+
| 7 ...
  Topic: Local Paper Puzzle
leocar

Replies: 12
Views: 37713

PostForum: Other puzzles   Posted: Sat May 15, 2010 4:15 am   Subject: Local Paper Puzzle
Thank you for the responses. I think I have the W-Wing worked out (I hope). So if the start is the R2C8 23 then linked to the 2 in R3C7, then linked to the 2 in R9C7 and ending with the 23 in R9C5. No ...
  Topic: Local Paper Puzzle
leocar

Replies: 12
Views: 37713

PostForum: Other puzzles   Posted: Fri May 14, 2010 11:41 am   Subject: Local Paper Puzzle
Is it the 2 in R9C8 which is eliminated leaving 36 but I can't see the next step. Much to my frustration! Is there another X wing that I'm missing?[/quote]
  Topic: Local Paper Puzzle
leocar

Replies: 12
Views: 37713

PostForum: Other puzzles   Posted: Fri May 14, 2010 10:46 am   Subject: Local Paper Puzzle
Hi,

below is where I got with basics (further below is the original puzzle) but can't get any further. The puzzle is out of a local paper. The grader says it’s too difficult, is this true and it’s ...
  Topic: Very Hard 13-01-2009
leocar

Replies: 2
Views: 15763

PostForum: Daily Sudoku puzzles   Posted: Fri Mar 05, 2010 7:22 am   Subject: Very Hard 13-01-2009
Thank you for that, for some reason I was using the cell I was trying to eliminate from as the pivot! It's much clearer now.

Cheers
Leo
  Topic: Very Hard 13-01-2009
leocar

Replies: 2
Views: 15763

PostForum: Daily Sudoku puzzles   Posted: Thu Mar 04, 2010 5:46 am   Subject: Very Hard 13-01-2009
Hi, I'm just learning how to complete the very hard sudoku's and I'm confussed with the x-y wings. I have attached a code from 13-01-2009 VH.

I thought there was an x-y wing 567 (R6C1, R5C3, R4C8) ...
 
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