| View previous topic :: View next topic |
| Author |
Message |
ZeroAssoluto
Joined: 05 Feb 2017
Posts: 942
Location: Rimini, Italy
|
 Posted: Fri Feb 03, 2023 10:42 am Post subject: Feb 03 VH |
 |
|
Hi everyone,
| Code: |
+------------+----------+--------------+
| 135 8 2 | 6 7 35 | 145 9 45 |
| 156 7 16 | 4 9 8 | 15 3 2 |
| 35 9 4 | 25 1 235 | 6 8 7 |
+------------+----------+--------------+
| 8 12 5 | 9 6 124 | 7 24 3 |
| 7 26 9 | 8 3 24 | 45 2456 1 |
| 4 3 16 | 12 5 7 | 9 26 8 |
+------------+----------+--------------+
| 2 56 3 | 15 4 156 | 8 7 9 |
| 9 4 8 | 7 2 56 | 3 1 56 |
| 16 156 7 | 3 8 9 | 2 45 456 |
+------------+----------+--------------+
|
Play this puzzle online at the Daily Sudoku site
| Quote: | XY-Wing
1,2,6 in r4c2,r6c38 and -2 in r4c8
1,2,6 in r5c2,r6c34 and -2 in r5c6
or W-Wing
2,4 in r4c8,r5c6 SL with number 2 in r6c48 and -4 in r4c6,r5c78
2,4 in r4c8,r5c6 SL with number 2 in r45c2 and -4 in r4c6,r5c78
|
Ciao Gianni |
|
| Back to top |
|
 |
TomC
Joined: 30 Oct 2020
Posts: 358
Location: Wales
|
| Posted: Fri Feb 03, 2023 11:29 am Post subject: |
|
|
Remove <2> from r3c4 to solve
| Code: |
+---------------+--------------+----------------+
| x135 8 2 | 6 7 x35 | 145 9 45 |
| 156 7 d16 | 4 9 8 | 15 3 2 |
| x35 9 4 | a25 1 x235 | 6 8 7 |
+---------------+--------------+----------------+
| 8 12 5 | 9 6 124 | 7 24 3 |
| 7 26 9 | 8 3 24 | 45 2456 1 |
| 4 3 c16 | b12 5 7 | 9 26 8 |
+---------------+--------------+----------------+
| 2 56 3 | 15 4 156 | 8 7 9 |
| 9 4 8 | 7 2 56 | 3 1 56 |
| 16 156 7 | 3 8 9 | 2 45 456 |
+---------------+--------------+----------------+
|
| Quote: | A short chain leads to the solution
If a=2, b=1, c=6, d=1 creates a <35> Unique Rectangle in r13c16
|
|
|
| Back to top |
|
|
Greenvilleguy
Joined: 01 Jul 2022
Posts: 24
Location: US
|
| Posted: Sat Feb 04, 2023 12:07 am Post 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? |
|
| Back to top |
|
|
TomC
Joined: 30 Oct 2020
Posts: 358
Location: Wales
|
| Posted: Sat Feb 04, 2023 10:30 am Post subject: Re: Feb 3 VH |
|
|
| Greenvilleguy wrote: | | 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? |
This is all about patterns and how they link
r13c16 is almost a <35> UR and would be an actual one if you could eliminate <1> from r1c1 and <2> from r3c6
The links between the <1>s in c3 and the <2>s in c4 do this
Another way to describe this:
If b=1 then c<>1, d=1
If b=1 then b<>2, a=2
So b must be <2> as a=2 and d=1 produce the <35> UR |
|
| Back to top |
|
|
Greenvilleguy
Joined: 01 Jul 2022
Posts: 24
Location: US
|
| Posted: Sat Feb 04, 2023 12:35 pm Post subject: Feb 3 VH |
|
|
| Thanks. Very clever. I would not have found that. |
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
