Author |
Message |
Topic: Mar 15 VH |
TomC
Replies: 1
Views: 4024
|
Forum: Daily Sudoku puzzles Posted: Fri Mar 15, 2024 1:23 pm Subject: Mar 15 VH |
I thought I saw a <129> XY wing in abc, not so, but still helped me remove <2> from r7c5 or r9c9 to solve
+--------+------------+------------+
| 3 8 6 | 2 19 4 | 5 179 179 |
| 2 ... |
Topic: Mar 07 VH |
TomC
Replies: 2
Views: 10041
|
Forum: Daily Sudoku puzzles Posted: Thu Mar 07, 2024 10:19 am Subject: Mar 07 VH |
r3c1 = <9> to solve
Look at the <78> pairs in boxes 4 and 6
If r3c1 = <78> the puzzle would have two solutions
|
Topic: Feb 17 VH |
TomC
Replies: 1
Views: 4728
|
Forum: Daily Sudoku puzzles Posted: Sat Feb 17, 2024 11:48 am Subject: Feb 17 VH |
Daily Sudoku puzzles
The Daily Sudoku puzzles: Discussion, help with the logic, and creative solutions
For a creative solution:
r4c6 = <5> to solve
If r4c6 = <18> you would have ... |
Topic: VH+ 012724 |
TomC
Replies: 3
Views: 7518
|
Forum: Other puzzles Posted: Sun Jan 28, 2024 11:59 am Subject: VH+ 012724 |
Remove <8> from r9c7 to solve
+--------------+----------------+----------------+
| 1 6 2 | 458 58 3 | 7 9 458 |
| 45 7 3 | 4568 9 56 | 1 2 458 |
| 459 ... |
Topic: Jan 26 VH |
TomC
Replies: 2
Views: 6171
|
Forum: Daily Sudoku puzzles Posted: Fri Jan 26, 2024 1:19 pm Subject: Jan 26 VH |
<17> W wing in r1c1, r4c2 removes <7> in r3c2 or r6c1, otherwise box 7 no <1>'s
or
<17> W wing in r1c1, r4c2 removes <7> in r3c2 or r6c1, otherwise column 3 no <1> ... |
Topic: Jan 18 VH |
TomC
Replies: 1
Views: 5097
|
Forum: Daily Sudoku puzzles Posted: Fri Jan 19, 2024 4:41 pm Subject: Jan 18 VH |
There is a pattern of <78> in rows 4, 5 and 6 which means that r4c9 can't be <78> so must be <5>
Has this pattern got a name? |
Topic: VH+(+) 010624 |
TomC
Replies: 2
Views: 8612
|
Forum: Other puzzles Posted: Sun Jan 07, 2024 10:15 am Subject: VH+(+) 010624 |
Remove <5> from r5c7 to solve
+---------------+-----------+----------------+
| 469 7 2 | 5 3 69 | 8 14 16 |
| 3 1689 168 | 4 689 7 | c29 5 26 |
| 5 4689 468 | ... |
Topic: Dec 30 VH |
TomC
Replies: 1
Views: 6382
|
Forum: Daily Sudoku puzzles Posted: Sat Dec 30, 2023 6:49 pm Subject: Dec 30 VH |
Remove <2> from r6c4 to solve
A short chain leads to a contradiction
If r6c4=2, r6c6=6, r4c6=5, r4c1=7 then no <7>'s in box 5 |
Topic: Dec 26 VH |
TomC
Replies: 1
Views: 5988
|
Forum: Daily Sudoku puzzles Posted: Tue Dec 26, 2023 6:59 pm Subject: Dec 26 VH |
There is an XY chain 57-79-69-56 in boxes 8 and 9 to remove <5> from r7c5 to solve
Look out for a XY wing 79-1 in there too! (Doesn't solve it in one though) |
Topic: Dec 22 VH |
TomC
Replies: 1
Views: 7002
|
Forum: Daily Sudoku puzzles Posted: Fri Dec 22, 2023 1:44 pm Subject: Another way to solve |
Remove <3> from r1c4 or r8c5 to solve
+-------------+-----------------+---------------+
| 4 68 2 | a39 b38 5 | 1 3689 7 |
| 1 7 3 | 6 248 29 | 489 489 5 |
... |
Topic: Nov 29 VH |
TomC
Replies: 1
Views: 9825
|
Forum: Daily Sudoku puzzles Posted: Wed Nov 29, 2023 1:32 pm Subject: Nov 29 VH |
r8c4 = 2 to solve or r7c7 = 4 to solve
Look at r357c45
If r8c4 = 9 (or r7c7 = 9) then you would have three pairs <24> <45> <25> in r357c45 which would give the puzzle two solut ... |
Topic: Nov 27 VH |
TomC
Replies: 1
Views: 9395
|
Forum: Daily Sudoku puzzles Posted: Tue Nov 28, 2023 9:38 am Subject: Nov 27 VH |
Remove <5> from r4c6, r9c8 to solve
+------------+--------------+-------------+
| 18 7 3 | 9 5 18 | 2 6 4 |
| 5 2 4 | 3 67 b68 | 9 c78 1 |
| 9 168 68 | 2 ... |
Topic: Nov 24 VH |
TomC
Replies: 2
Views: 10120
|
Forum: Daily Sudoku puzzles Posted: Sat Nov 25, 2023 9:35 am Subject: Nov 24 VH |
Remove <5> from r1c7, r9c8 to solve
+--------+----------+---------------+
| 2 1 6 | 3 79 4 | x578 d59 78 |
| 9 5 7 | 68 68 1 | 2 3 4 |
| 3 4 8 | 5 79 2 | b17 c19 6 |
... |
Topic: Nov 21 VH |
TomC
Replies: 2
Views: 10621
|
Forum: Daily Sudoku puzzles Posted: Wed Nov 22, 2023 8:43 am Subject: Nov 21 VH |
Remove <7> from r8c8 to solve
Whatever the value of r7c7 <348> r8c8 cannot be <7> |
Topic: Nov 14 VH |
TomC
Replies: 3
Views: 10993
|
Forum: Daily Sudoku puzzles Posted: Thu Nov 16, 2023 1:10 pm Subject: Nov 14 VH |
Can anyone explain Draw/Play hint of r2c3 = 1 as the solution?
I can see a chain that would give this, but it must be X, XY or XYZ, or not? |
Topic: VH+ 110823 |
TomC
Replies: 2
Views: 15313
|
Forum: Other puzzles Posted: Thu Nov 09, 2023 3:59 pm Subject: VH+ 110823 |
Nice one, Immpy
I used forcing a unique rectangle to solve
+---------------+-------------------+---------------+
| 2 5 178 | 17 4 3 | 168 9 1678 |
| 178 6 1378 | 1579 ... |
Topic: Nov 01 VH |
TomC
Replies: 1
Views: 8920
|
Forum: Daily Sudoku puzzles Posted: Wed Nov 01, 2023 1:27 pm Subject: Re: Nov 01 VH |
Remove <8> from r9c9 to solve
If r9c9=8, r9c2=1, r3c2=2, r3c9=3 this would produce a UR <12> in r27c89
|
Topic: Oct 30 VH |
TomC
Replies: 1
Views: 8848
|
Forum: Daily Sudoku puzzles Posted: Mon Oct 30, 2023 6:23 pm Subject: Oct 30 VH |
Remove <1> from r6c2 to solve
+---------------+---------+---------+
| 3 8 4 | 7 9 2 | 5 6 1 |
| 9 7 56 | 56 4 1 | 8 2 3 |
| 16 156 2 | 3 56 8 | 9 4 7 |
+---- ... |
Topic: Oct 26 VH |
TomC
Replies: 1
Views: 10339
|
Forum: Daily Sudoku puzzles Posted: Fri Oct 27, 2023 12:26 pm Subject: Oct 26 VH |
Or you could use the XY chain 17-47-49-19 in r1c1, r2c19, r3c8 to remove <1> from r3c1 and r1c8 |
Topic: Oct 15 VH |
TomC
Replies: 1
Views: 14164
|
Forum: Daily Sudoku puzzles Posted: Sun Oct 15, 2023 2:51 pm Subject: Oct 15 VH |
r2c1 = <7> to avoid Unique Rectangle <24> in r14c12 |
|