| View previous topic :: View next topic |
| Author |
Message |
pageo1
Joined: 15 Jun 2011
Posts: 3
|
 Posted: Wed Jun 15, 2011 4:07 am Post subject: Daily sudoku classic 15/6/2011 |
 |
|
| Have gone as far as possible with this puzzle, and have had to get a hint. The hint being place a 7 in row 6 column 6 can somebody tell me why? |
|
| Back to top |
|
 |
Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
|
| Posted: Wed Jun 15, 2011 4:40 am Post subject: |
|
|
Is this where you are?
| Code: |
+-----------+---------------+----------------+
| 35 4 6 | 1378 178 2 | 135 1579 1579 |
| 2 7 8 | 13 5 9 | 134 14 6 |
| 35 1 9 | 37 6 4 | 2 8 57 |
+-----------+---------------+----------------+
| 4 268 12 | 5789 2789 3 | 15 15679 1579 |
| 7 26 5 | 4 29 1 | 8 69 3 |
| 9 38 13 | 6 78 578 | 145 1457 2 |
+-----------+---------------+----------------+
| 1 9 47 | 2 478 578 | 6 3 58 |
| 8 25 27 | 157 3 6 | 9 15 4 |
| 6 35 34 | 1589 1489 58 | 7 2 158 |
+-----------+---------------+----------------+
|
Play this puzzle online at the Daily Sudoku site
There is an XY-Wing, 35-38-58, pivoted in r9c2. Making the elimination therefrom and doing some subsequent cleanup will place a 7 in r6c6. |
|
| Back to top |
|
|
pageo1
Joined: 15 Jun 2011
Posts: 3
|
| Posted: Wed Jun 15, 2011 5:43 am Post subject: classic 15/6 |
|
|
| Yes that is the point that I am at. |
|
| Back to top |
|
|
pageo1
Joined: 15 Jun 2011
Posts: 3
|
| Posted: Wed Jun 15, 2011 5:49 am Post subject: xy wing |
|
|
| sorry am not understanding x-y wing. have just come to terms with x-wing. |
|
| Back to top |
|
|
Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
|
| Posted: Wed Jun 15, 2011 3:41 pm Post subject: Re: xy wing |
|
|
| pageo1 wrote: | | sorry am not understanding x-y wing. have just come to terms with x-wing. |
A quick definition of an XY-Wing is:
Start with a cell XY. That cell must see a cell XZ and another cell YZ. Any cell that sees both XZ and YZ cannot be Z.
Take a look at this and see if it's clear.
http://www.sudopedia.org/wiki/XY-Wing |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
