| View previous topic :: View next topic |
| Author |
Message |
Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
|
 Posted: Sat Jun 23, 2012 10:16 pm Post subject: Jun 24 VH |
 |
|
| XY-Wing 57 78 58 pivoted in r3c8 solves it by setting r7c2<>5. |
|
| Back to top |
|
 |
dongrave
Joined: 06 Mar 2014
Posts: 568
|
| Posted: Thu Mar 06, 2014 2:43 pm Post subject: Jun 24 2012 VH |
|
|
| I'm going back through the archive now to try to solve the VH ones. How did you eliminate the candidate 5 from r3c8? I had the candidates 578 instead of just 78 in r3c8 so I missed the XY wing. Thanks. |
|
| Back to top |
|
|
Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
|
| Posted: Thu Mar 06, 2014 5:49 pm Post subject: |
|
|
| Code: |
+--------------+--------+-------------+
| 16 8 56 | 7 15 9 | 4 3 2 |
| 17 3 2 | 4 6 8 | 159 579 579 |
| 4 57 9 | 3 15 2 | 158 578 6 |
+--------------+--------+-------------+
| 578 9 4 | 1 2 3 | 58 6 578 |
| 57 2 1 | 8 79 6 | 3 579 4 |
| 3678 67 3678 | 5 79 4 | 2 1 789 |
+--------------+--------+-------------+
| 9 56 568 | 2 4 1 | 7 58 3 |
| 37 4 37 | 9 8 5 | 6 2 1 |
| 2 1 58 | 6 3 7 | 589 4 589 |
+--------------+--------+-------------+
|
Play this puzzle online at the Daily Sudoku site
I don't know if I'm done with basics yet. But look at row 2. The 5s are restricted to row 2 in box 3, thus no other rows in that box can contain 5. |
|
| Back to top |
|
|
dongrave
Joined: 06 Mar 2014
Posts: 568
|
| Posted: Thu Mar 06, 2014 6:21 pm Post subject: |
|
|
| Oh! How obvious! How did I miss that? I actually still had a 5 in r1c1 and r2c1 even though I knew that r4c1 or r5c1 had to be a 5. Thanks! |
|
| Back to top |
|
|
Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
|
| Posted: Thu Mar 06, 2014 9:00 pm Post subject: |
|
|
| That situation in row 2 is called either Locked Candidates or Box-Line Interactions and are extremely easy to miss. Many people miss them, including myself. |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
