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  Topic: Jan 18 VH
TomC

Replies: 3
Views: 82

PostForum: Daily Sudoku puzzles   Posted: Tue Jan 18, 2022 10:29 am   Subject: Jan 18 VH
Pincers on <1> in r2c8 and r8c9 leads to -1 in r3c9 and r9c8
  Topic: Jan 08 VH
TomC

Replies: 6
Views: 564

PostForum: Daily Sudoku puzzles   Posted: Sat Jan 08, 2022 4:54 pm   Subject: Jan 08 VH
or pincers on <6> in r7c5 and r9c7 gives -6 in r9c45 and r7c7
  Topic: Jan 08 VH
TomC

Replies: 6
Views: 564

PostForum: Daily Sudoku puzzles   Posted: Sat Jan 08, 2022 3:51 pm   Subject: Jan 08 VH
Another way to solve is by the nearly <26> pair in r9

If r9c7=4, <26> pair gives r7c5=1, r8c4=3, r8c7= also 4!

r9c7 must be <6>
  Topic: Jan 08 VH
TomC

Replies: 6
Views: 564

PostForum: Daily Sudoku puzzles   Posted: Sat Jan 08, 2022 1:44 pm   Subject: Jan 08 VH
Gianni, is there not another basic move needed before the XY wings will work?
  Topic: Jan 05 VH
TomC

Replies: 6
Views: 667

PostForum: Daily Sudoku puzzles   Posted: Thu Jan 06, 2022 8:13 pm   Subject: Jan 05 VH
Looking at this again, you don't need the 145 XYZ wing first

if the pivot in r7c2=5 then r8c7=5, r3c7=4, r7c7=8
if the pivot in r7c2=4 then r6c2=8

Pincers of 8 remove the 8 from r6c7 and solve ...
  Topic: VH 123021
TomC

Replies: 8
Views: 859

PostForum: Other puzzles   Posted: Wed Jan 05, 2022 7:20 pm   Subject: VH 123021
Not sure, I'm thinking it maybe Paloma Faith's third album you're hearing
  Topic: Jan 05 VH
TomC

Replies: 6
Views: 667

PostForum: Daily Sudoku puzzles   Posted: Wed Jan 05, 2022 1:15 pm   Subject: Jan 05 VH

+----------+--------+-------------+
| 3 7 4 | 6 1 5 | 2 9 8 |
| 6 2 5 | 9 4 8 | 17 3 17 |
| 1 9 8 | 7 3 2 | 45 46 56 |
+----------+--------+-------------+
| 57c 1 6 | ...
  Topic: Jan 05 VH
TomC

Replies: 6
Views: 667

PostForum: Daily Sudoku puzzles   Posted: Wed Jan 05, 2022 12:59 pm   Subject: Jan 05 VH
code
  Topic: VH 123021
TomC

Replies: 8
Views: 859

PostForum: Other puzzles   Posted: Wed Jan 05, 2022 11:56 am   Subject: VH 123021
Extend the XY chain by one and r6c7 <> 4 as then a=4 and no <4> in box 5
  Topic: Unfair 010222
TomC

Replies: 6
Views: 727

PostForum: Other puzzles   Posted: Mon Jan 03, 2022 7:39 pm   Subject: Unfair 010222
My explanation clearly wasn't complete, so....

It's impossible
For a quad to hold just three
It's just impossible
  Topic: Unfair 010222
TomC

Replies: 6
Views: 727

PostForum: Other puzzles   Posted: Mon Jan 03, 2022 9:38 am   Subject: Unfair 010222
r6c456 <> 1 as this would create a <468> quad in row 4

Easier to see than explain, but here goes:

if r6c4=1, then r1c4=5, so r4 has [68 468 468 46]

if r6c56=1, then <69> pai ...
  Topic: VH 123021
TomC

Replies: 8
Views: 859

PostForum: Other puzzles   Posted: Fri Dec 31, 2021 7:34 pm   Subject: VH 123021
Thanks Immpy, a nice puzzle to end the year

Sometimes patterns are nice to spot, but may or not help you solve

In this case, you can remove the 1 in r7c1 as you would get <46> pair in box ...
  Topic: Dec 28 VH
TomC

Replies: 5
Views: 761

PostForum: Daily Sudoku puzzles   Posted: Tue Dec 28, 2021 2:52 pm   Subject: Dec 28 VH
If r3c6 was 9 then there would be no 9's in row 4 and no 9's in row 9 as well

Is that different to an X wing?
  Topic: Dec 28 VH
TomC

Replies: 5
Views: 761

PostForum: Daily Sudoku puzzles   Posted: Tue Dec 28, 2021 12:51 pm   Subject: Dec 28 VH
Or you could say r9c6 <> 9 as then r3c6 = 4, r1c4 = 9 leads to no <9>'s in box 5
  Topic: Dec 28 VH
TomC

Replies: 5
Views: 761

PostForum: Daily Sudoku puzzles   Posted: Tue Dec 28, 2021 11:39 am   Subject: Dec 28 VH
Using standard moves

X wing on <9> r49 removes 9 from r3c6
then XY wing <459> removes 5 from r3c5
  Topic: VH Christmas Day 2021
TomC

Replies: 9
Views: 1234

PostForum: Daily Sudoku puzzles   Posted: Sat Dec 25, 2021 5:54 pm   Subject: VH Christmas Day 2021
I thought they looked more like prancers for 6
  Topic: VH Christmas Day 2021
TomC

Replies: 9
Views: 1234

PostForum: Daily Sudoku puzzles   Posted: Sat Dec 25, 2021 3:31 pm   Subject: VH Christmas Day 2021
Or r7c8 <> 6 as short XY chain gives r5c7 = 6 and then no room at the inn for baby <6> in stable 3
  Topic: VH Christmas Day 2021
TomC

Replies: 9
Views: 1234

PostForum: Daily Sudoku puzzles   Posted: Sat Dec 25, 2021 3:28 pm   Subject: VH Christmas Day 2021
Another way is XYZ <125> gives r2c8 <> 1
  Topic: VH+ 122221
TomC

Replies: 5
Views: 1478

PostForum: Other puzzles   Posted: Thu Dec 23, 2021 7:30 pm   Subject: VH+ 122221
No problem, I found that r5c1<> 2 and this solves it, but didn't notice that it could also be not 8

Tomos
  Topic: VH+ 122221
TomC

Replies: 5
Views: 1478

PostForum: Other puzzles   Posted: Thu Dec 23, 2021 9:37 am   Subject: VH+ 122221
Thanks Immp and Merry Christmas to you !

I will leave after basics to others and white out my solution. Decided on a less conventional one.

It's the march of the <28> pairs. Quite a few on ...
 
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