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  Topic: Apr 18 VH
Greenvilleguy

Replies: 2
Views: 25246

PostForum: Daily Sudoku puzzles   Posted: Mon Apr 22, 2024 12:30 pm   Subject: Apr 18 VH
Did anyone solve this by anything other than trial? I see that R7C9 cannot be a 7, because of the way it relates to R7C5, R9C4 and R9C9; but it don't know why.
  Topic: Mar 07 VH
Greenvilleguy

Replies: 2
Views: 29649

PostForum: Daily Sudoku puzzles   Posted: Mon Mar 18, 2024 3:22 pm   Subject: Mar 07 VH
R1C3 - R1C4 - R2C5 make a Y wing. R2C3 cannot be a 4.
  Topic: Jan 26 VH
Greenvilleguy

Replies: 2
Views: 21070

PostForum: Daily Sudoku puzzles   Posted: Sat Jan 27, 2024 4:12 pm   Subject: Jan 26 VH
Thanks, I didn't see that one.
  Topic: Jan 21 VH
Greenvilleguy

Replies: 2
Views: 20394

PostForum: Daily Sudoku puzzles   Posted: Mon Jan 22, 2024 2:00 pm   Subject: Jan 21 VH
Y Wing in R4C2 (25), R5C1 (5Cool, R5C9 (2Cool eliminates 2s in R4C8 and R4C9
  Topic: Jan 05 VH
Greenvilleguy

Replies: 1
Views: 16363

PostForum: Daily Sudoku puzzles   Posted: Sat Jan 06, 2024 1:51 pm   Subject: Jan 05 VH
Did anyone solve? I found the Y wing: R2C1(1Cool, R2C5(3Cool, R3C6(13) eliminates 1 in R3C3, but didn't get any further.
  Topic: Dec 14 VH
Greenvilleguy

Replies: 2
Views: 20826

PostForum: Daily Sudoku puzzles   Posted: Tue Dec 19, 2023 1:13 pm   Subject: Dec 14 VH
The a, b, c below form a "Y" wing. x cannot be a 4.

+-----------+----------+-----------+
| 159 19 59 | 4 3 7 | 8 2 6 |
| 4 2 6 | 1 8 9 | 7 3 5 |
| 8 7 3 | 56 5 ...
  Topic: Dec 02 VH
Greenvilleguy

Replies: 1
Views: 19349

PostForum: Daily Sudoku puzzles   Posted: Tue Dec 05, 2023 4:35 pm   Subject: Dec 02 VH
+----------+----------+--------+
| 3 279 4 | 8 79 6 | 27 5 1 |
| 8 a27 1 | x27 4 5 | 6 9 3 |
| 5 6 b79 | 1 3 c29 | 27 4 8 |
+----------+----------+--------+
| 7 4 6 | 9 5 3 | 1 ...
  Topic: Nov 24 VH
Greenvilleguy

Replies: 2
Views: 18894

PostForum: Daily Sudoku puzzles   Posted: Sat Nov 25, 2023 2:10 pm   Subject: Nov 24 VH
Also, Y wing in R1C9, R3C7, R5C7 removes <8> from R1C7.

Interestingly, a 3 must be in R5C5 or you would have a rectangle of "68'S", which is not allowed in a solvable puzzle.
  Topic: Nov 21 VH
Greenvilleguy

Replies: 2
Views: 19236

PostForum: Daily Sudoku puzzles   Posted: Thu Nov 23, 2023 1:35 pm   Subject: Nov 21 VH
r2c7 must be a 3; otherwise you have a UR in R3c27 and r4c27.
  Topic: Nov 14 VH
Greenvilleguy

Replies: 3
Views: 21156

PostForum: Daily Sudoku puzzles   Posted: Mon Nov 20, 2023 5:59 pm   Subject: Nov 14 VH
I used the 169 XY Wing at r27c7,r9c9 (-1r12c9) which solved it.

Thanks!
  Topic: Oct 18 VH
Greenvilleguy

Replies: 1
Views: 28721

PostForum: Daily Sudoku puzzles   Posted: Fri Oct 20, 2023 7:46 pm   Subject: OCT 18 VH
Y wing in R8c1, R8C9 and R5C9 eliminates 8 from R5C1
  Topic: Oct 03 VH
Greenvilleguy

Replies: 1
Views: 22565

PostForum: Daily Sudoku puzzles   Posted: Tue Oct 10, 2023 7:25 pm   Subject: Oct 03 VH
Y wing - r1c7, r3c6, r3c8 eliminates 6 in R1c5, r1c6 and r3c7
  Topic: Aug 22 VH
Greenvilleguy

Replies: 1
Views: 23099

PostForum: Daily Sudoku puzzles   Posted: Mon Aug 28, 2023 4:15 pm   Subject: Aug 22 VH
Y wing - r4c6, r4c8, r5c7 - eliminates 4 in r5c4 and r5c6
  Topic: Aug 08 VH
Greenvilleguy

Replies: 1
Views: 20257

PostForum: Daily Sudoku puzzles   Posted: Fri Aug 18, 2023 4:18 pm   Subject: vh Aug 8
Y wing - R4C3, R7C3, R9C1 Eliminates 2 in R5C1
  Topic: Jul 23 VH
Greenvilleguy

Replies: 1
Views: 23727

PostForum: Daily Sudoku puzzles   Posted: Sat Jul 29, 2023 8:52 pm   Subject: VH JUl 23
Y wing - hinge r9c3 - r7c6 = 1
  Topic: Apr 02 VH
Greenvilleguy

Replies: 2
Views: 23968

PostForum: Daily Sudoku puzzles   Posted: Mon Apr 03, 2023 12:33 pm   Subject: VH April 2
I used a even number 69 chain starting with R1C3 and ending in R5C2. The result is that R1C2 cannot be a 6 or a 9.
  Topic: Feb 05 VH
Greenvilleguy

Replies: 1
Views: 16961

PostForum: Daily Sudoku puzzles   Posted: Sun Feb 05, 2023 9:49 pm   Subject: Feb 5 VH
Thanks!
  Topic: Feb 03 VH
Greenvilleguy

Replies: 4
Views: 21674

PostForum: Daily Sudoku puzzles   Posted: Sat Feb 04, 2023 12:35 pm   Subject: Feb 3 VH
Thanks. Very clever. I would not have found that.
  Topic: Feb 03 VH
Greenvilleguy

Replies: 4
Views: 21674

PostForum: Daily Sudoku puzzles   Posted: Sat Feb 04, 2023 12:07 am   Subject: Feb 3 VH
OK, I see that eliminating the "2" from R3C4 solves it, but how did you know to eliminate the "2". Was it a try one and if that doesn't work, it's the other one?
  Topic: Feb 01 VH
Greenvilleguy

Replies: 2
Views: 16584

PostForum: Daily Sudoku puzzles   Posted: Fri Feb 03, 2023 5:27 pm   Subject: Feb 1 VH
Thanks Tom. I missed it!
 
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