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  Topic: too hard for draw and play function?
TomC

Replies: 3
Views: 555

PostForum: Other puzzles   Posted: Tue Aug 02, 2022 7:35 am   Subject: too hard for draw and play function?

+---------------------+-------------------+----------------+
| 9 123567 124567 | 134568 3478 45678 | 248 1456 268 |
| 1456 12567 8 | 1456 479 45679 | 249 14569 3 |
| 13456 1356 ...
  Topic: Aug 01 VH
TomC

Replies: 1
Views: 302

PostForum: Daily Sudoku puzzles   Posted: Mon Aug 01, 2022 9:48 am   Subject: another way...
r9c8 = 8 to solve

+--------------------+---------------+--------------+
| 2 78 789 | 4 136 1368 | 5 137 139 |
| 4789 5 4789 | 18 2 138 | 6 137 139 |
| 6 3 ...
  Topic: Jul 30 VH
TomC

Replies: 1
Views: 331

PostForum: Daily Sudoku puzzles   Posted: Sat Jul 30, 2022 7:31 pm   Subject: Jul 30 VH
XY chain abcd gives pincers of <1> in a+d to remove <1> from r7c8 to solve

+-----------+----------------+----------------+
| 168 2 36 | e18 5 9 | 4 7 138 |
| 18 9 5 ...
  Topic: Jul 27 VH
TomC

Replies: 2
Views: 533

PostForum: Daily Sudoku puzzles   Posted: Wed Jul 27, 2022 10:55 am   Subject: and another ...
Or you could have -6 in r9c8 to avoid the <45> UR in r79c57
  Topic: Jul 27 VH
TomC

Replies: 2
Views: 533

PostForum: Daily Sudoku puzzles   Posted: Wed Jul 27, 2022 9:28 am   Subject: Another way
XY chain abcd shows that if a=3 then d=4 OR if d=7 then a=4

So either a or d must be <4>

Pincers for <4> in a + d give -4 in r5c9 to solve (edit: and of course -4 in r4c6 as well)
...
  Topic: Jul 25 VH
TomC

Replies: 2
Views: 652

PostForum: Daily Sudoku puzzles   Posted: Mon Jul 25, 2022 9:39 am   Subject: Jul 25 VH
XY chain abcde give pincers on <2> in a + e to give -2 in r2c3 and r3c6 to solve

+-----------+-------------+---------+
| 1 7 5 | 6 9 4 | 3 2 8 |
| 4 38 -238 | 78 e27 5 | 9 1 ...
  Topic: Jul 22 VH
TomC

Replies: 2
Views: 620

PostForum: Daily Sudoku puzzles   Posted: Mon Jul 25, 2022 9:31 am   Subject: Jul 22 VH
XY chain abcde give pincers on <7> in a + e to give -7 in r6c8

+---------+---------------+--------------+
| 6 78 3 | 9 28 1 | 24 5 47 |
| 9 5 78 | c23 4 238 | d26 e67 1 ...
  Topic: Jul 22 VH
TomC

Replies: 2
Views: 620

PostForum: Daily Sudoku puzzles   Posted: Sat Jul 23, 2022 9:36 am   Subject: Jul 22 VH
r6c6 = 5 to solve

+---------+---------------+--------------+
| 6 78 3 | 9 28 1 | 24 5 47 |
| 9 5 78 | b23 4 b238 | c26 d67 1 |
| 1 4 2 | 6 5 7 | 8 3 9 |
+-- ...
  Topic: Jul 19 VH
TomC

Replies: 1
Views: 652

PostForum: Daily Sudoku puzzles   Posted: Tue Jul 19, 2022 10:01 am   Subject: Jul 19 VH
14-6 XY wing in r1c4, r37c5 gives -6 in r1c5, r7c4
  Topic: Jul 17 VH
TomC

Replies: 2
Views: 799

PostForum: Daily Sudoku puzzles   Posted: Mon Jul 18, 2022 11:43 am   Subject: Jul 17 VH
W-Wing 1,3 in r2c1,r3c6 SL with number 1 in r1c16 (or r23c9) and -3 in r2c5,r3c1

Which I see as -3 in r2c5,r3c1 as then no <1> in row 1 or box 3
  Topic: Jul 17 VH
TomC

Replies: 2
Views: 799

PostForum: Daily Sudoku puzzles   Posted: Sun Jul 17, 2022 9:55 am   Subject: Jul 17 VH
Pincers for <1> in a+d gives -1 in r1c1


+---------------+--------------+----------+
| -17 57 9 | c25 4 d12 | 36 36 8 |
| a13 6 2 | 7 b35 8 | 4 9 15 |
| 134 45 8 ...
  Topic: Jul 14 VH
TomC

Replies: 1
Views: 636

PostForum: Daily Sudoku puzzles   Posted: Fri Jul 15, 2022 8:27 pm   Subject: Jul 14 VH
I can see this solution but it's taken me longer to explain:

If x=3, a=7, b=4, c=9, d=1 leads to no <1> in box 6
If x=7, b=4, c=9, d=1 leads to no <1> in box 6

So xz is a <14> ...
  Topic: Jul 09 VH
TomC

Replies: 2
Views: 1009

PostForum: Daily Sudoku puzzles   Posted: Mon Jul 11, 2022 5:58 pm   Subject: Re: Jul 09 VH
Has anyone solved this one? I did, but I had to quess (ugh!).

Hi everyone,


+------------+---------+--------------+
| 3 1 24 | 6 7 8 | 9 5 24 |
| 8 5 6 | 23 9 4 | 17 13 ...
  Topic: Jul 07 VH
TomC

Replies: 1
Views: 931

PostForum: Daily Sudoku puzzles   Posted: Thu Jul 07, 2022 9:18 am   Subject: Jul 07 VH
A slightly more scenic route:

X wing on <4> in r67c24 removes <4> in r9c4 (and others)
W wing <27> in r8c3 and r9c4 removes <2> from r8c5 and r9c2 to solve
  Topic: Jul 01 VH
TomC

Replies: 1
Views: 1090

PostForum: Daily Sudoku puzzles   Posted: Fri Jul 01, 2022 12:34 pm   Subject: Jul 01 VH
r6c1=2 to solve


+------------------+-------------+-----------+
| 1 267 5 | 247 267 3 | 8 9 24 |
| 2349 d23 349 | 24 5 8 | 7 1 6 |
| 246 8 47 | 1 267 9 | ...
  Topic: Jun 30 VH
TomC

Replies: 2
Views: 1201

PostForum: Daily Sudoku puzzles   Posted: Thu Jun 30, 2022 12:07 pm   Subject: After a too long wait....
XY chain abcd gives pincers of <7> in a + d to remove <7> from r5c9


+-----------+------------+-------------+
| 3 9 1 | 2 5 8 | 4 67 67 |
| 8 5 4 | 1 6 7 | 2 ...
  Topic: VH+ 062822
TomC

Replies: 3
Views: 1840

PostForum: Other puzzles   Posted: Wed Jun 29, 2022 10:24 am   Subject: VH+ 062822
1st step, remove <4> from r1c6 with 457 XY wing abc

+---------------------+------------------+------------------------+
| 2 6 15 | 9 8 -45 | 1457 3 1457 |
| ...
  Topic: Jun 18 VH
TomC

Replies: 3
Views: 1872

PostForum: Daily Sudoku puzzles   Posted: Sat Jun 18, 2022 2:01 pm   Subject: Jun 18 VH
Or you could have -4 in r3c3 to avoid the <89> UR in r19c13
  Topic: Jun 18 VH
TomC

Replies: 3
Views: 1872

PostForum: Daily Sudoku puzzles   Posted: Sat Jun 18, 2022 1:58 pm   Subject: Jun 18 VH
XY chain abcde or edcba gives pincers of <1> in a+e to remove the <1> in r2c4 and r5c6

+------------+------------------+---------------+
| 489 3 489 | 7 245 6 | 459 1 245 ...
  Topic: Butterfly Pattern VH+
TomC

Replies: 5
Views: 2489

PostForum: Other puzzles   Posted: Fri Jun 17, 2022 12:14 pm   Subject: Butterfly Pattern VH+
Thanks for the notation Clement, I didn't think you needed a chain when three <46> pairs appear in one row

I probably should have explained it---- If a=7, x=<46>, b=7, c=1, x=<46>
 
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