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Clement
Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania
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 Posted: Sat Apr 21, 2012 10:47 pm Post subject: Apr 22 VH |
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| XY-Wing 167 pivoted in r6c4 solves it by setting r2c2<>6. |
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sheryl
Joined: 24 Sep 2007
Posts: 64
Location: New York
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| Posted: Mon Apr 23, 2012 1:46 pm Post subject: your solution |
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| my row r6c4 is 17, my r2c2 is 136 so i don't understand your solve, can you please explain. thanks. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Mon Apr 23, 2012 3:34 pm Post subject: Re: your solution |
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| sheryl wrote: | | my row r6c4 is 17, my r2c2 is 136 so i don't understand your solve, can you please explain. thanks. |
The 167 refers to the three numbers involved. The wing is 17 in r6c4, 16 in r2c4 and 67 in r6c2. R2c2 sees both of the 6s so it can't contain a 6. |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Mon Apr 23, 2012 3:41 pm Post subject: |
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I got to this grid after basic moves.
| Code: | *-----------------------------------------------------------*
| 7 8 69 | 4 1569 59 | 3 19 2 |
| 39 136 2 | 16 1689 7 | 4 189 5 |
| 5 14 49 | 3 1289 289 | 6 189 7 |
|-------------------+-------------------+-------------------|
| 2 357 1 | 57 345 45 | 8 6 9 |
| 39 35 589 | 2 3589 6 | 1 7 4 |
| 4 67 689 | 17 189 89 | 5 2 3 |
|-------------------+-------------------+-------------------|
| 1 9 7 | 56 56 3 | 2 4 8 |
| 6 245 45 | 8 7 24 | 9 3 1 |
| 8 24 3 | 9 24 1 | 7 5 6 |
*-----------------------------------------------------------* |
can you see the 176 wing?
Grids help. |
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sheryl
Joined: 24 Sep 2007
Posts: 64
Location: New York
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| Posted: Mon Apr 23, 2012 3:43 pm Post subject: my r2c2 |
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| is a 136 so i need to know how you got rid of the 3 |
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sheryl
Joined: 24 Sep 2007
Posts: 64
Location: New York
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| Posted: Mon Apr 23, 2012 3:45 pm Post subject: grid after basics |
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| my grid is the same, i do not see the 176 wing, please explain |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Mon Apr 23, 2012 3:47 pm Post subject: Re: my r2c2 |
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| sheryl wrote: | | is a 136 so i need to know how you got rid of the 3 |
After you get rid of the 6, only one 6 remains in box one and things will fall out as you continue from there. |
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sheryl
Joined: 24 Sep 2007
Posts: 64
Location: New York
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| Posted: Mon Apr 23, 2012 4:31 pm Post subject: sorry, i have |
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| no idea what you mean. can you be more specific how do you get rid of the 3 is 136 r2c2 |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Mon Apr 23, 2012 5:10 pm Post subject: Re: grid after basics |
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| sheryl wrote: | | my grid is the same, i do not see the 176 wing, please explain |
| Code: | *-----------------------------------------------------------*
| 7 8 69 | 4 1569 59 | 3 19 2 |
| 39 13-6 2 |a16 1689 7 | 4 189 5 |
| 5 14 49 | 3 1289 289 | 6 189 7 |
|-------------------+-------------------+-------------------|
| 2 357 1 | 57 345 45 | 8 6 9 |
| 39 35 589 | 2 3589 6 | 1 7 4 |
| 4 c67 689 |b17 189 89 | 5 2 3 |
|-------------------+-------------------+-------------------|
| 1 9 7 | 56 56 3 | 2 4 8 |
| 6 245 45 | 8 7 24 | 9 3 1 |
| 8 24 3 | 9 24 1 | 7 5 6 |
*-----------------------------------------------------------*
if a<>6 then b=7 then c=6 therefore r2c2<>6
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Mon Apr 23, 2012 5:16 pm Post subject: Re: sorry, i have |
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| sheryl wrote: | | no idea what you mean. can you be more specific how do you get rid of the 3 is 136 r2c2 |
Well, you don't get rid of the 3 because that cell ends up being solved for 3.
After eliminating the 6 you solve r1c3 for 6. That takes out the 6 in r6c3, leaving r6c2=6. After that the only 7 in row 6 is r6c4. After solving that for 7, you can solve column 4 which leaves r2c4=1 which takes out the 1 from r2c6, leaving only the 3 in that cell.
Hope that's clear enough.
However, if you meant how to get rid of the 6 instead of the 3, then see arkietech's post above. |
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sheryl
Joined: 24 Sep 2007
Posts: 64
Location: New York
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| Posted: Mon Apr 23, 2012 6:02 pm Post subject: xy wing |
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| sorry, i just didn't see the xy wing of 16/17/67. once you pointed that out to me, it solved. thanks. (don't know why i didn't see it, but i didn't) |
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