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Vanhegan fiendish 3/1/12

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arkietech

Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA

Posted: Thu Mar 01, 2012 4:21 pm Post subject: Vanhegan fiendish 3/1/12

Code:

*-----------*
|.2.|8..|..5|
|8..|..9|3..|
|.1.|.6.|.78|
|---+---+---|
|47.|..6|...|
|.98|...|76.|
|...|4..|.19|
|---+---+---|
|54.|.1.|.8.|
|..2|7..|..6|
|6..|..8|.5.|
*-----------*

Marty R.

Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

Posted: Thu Mar 01, 2012 5:59 pm Post subject:

XY-Wing (297); r7c9, r9c3<>7 Multi-coloring; r2c3<>4 As is often the case, I don't know if the first move enabled the second.

arkietech

Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA

Posted: Thu Mar 01, 2012 7:46 pm Post subject:

Code:

*-----------------------------------------------------------*
| 7 2 349 | 8 34 1 | 6 49 5 |
| 8 56 456 |x25 7 9 | 3 x24 1 |
| 39 1 3459 | 235 6 345-2 | 249 7 8 |
|-------------------+-------------------+-------------------|
| 4 7 15 | 19 89 6 | 58 *23 #23 |
| 123 9 8 | 1235 235 235 | 7 6 4 |
| 23 56 356 | 4 238 7 | 58 1 9 |
|-------------------+-------------------+-------------------|
| 5 4 79 | 6 1 *23 | 29 8 #237 |
| 19 8 2 | 7 3459 345 | 149 349 6 |
| 6 3 179 | 9-2 249 8 | 1249 5 27 |
*-----------------------------------------------------------*
w-wing with help
(2=3)r7c6-(3)r7c9=(3)r4c9-(3=2)r7c8-(2)r2c8=(2)r2c4 => r3c6,r9c4<>2

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