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arkietech
Joined: 31 Jul 2008 Posts: 1834 Location: Northwest Arkansas USA
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Posted: Wed Apr 18, 2012 5:47 am Post subject: au tough 4/16/12 |
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Code: |
*-----------*
|8..|...|25.|
|...|.7.|.6.|
|.17|...|...|
|---+---+---|
|..6|.5.|..8|
|...|794|...|
|4..|.2.|5..|
|---+---+---|
|...|...|19.|
|.6.|.1.|...|
|.42|...|..3|
*-----------*
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Marty R.
Joined: 12 Feb 2006 Posts: 5770 Location: Rochester, NY, USA
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Posted: Wed Apr 18, 2012 4:35 pm Post subject: |
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XY-Wing Chain in boxes 2368: 68-38-38-38-36; r9c7<>6.
Code: | +----------------+-------------------+---------------+
| 8 39 349 | 13469 346 1369 | 2 5 7 |
| 2359 2359 3459 | 23489 7 2389 | C38 6 1 |
| 6 1 7 | 25 A38 25 | 9 B38 4 |
+----------------+-------------------+---------------+
| 279 279 6 | 13 5 13 | 47 247 8 |
| 235 2358 1358 | 7 9 4 | D36 123 26 |
| 4 37 13 | 68 2 68 | 5 137 9 |
+----------------+-------------------+---------------+
| 357 3578 358 | 23468 3468 23678 | 1 9 256 |
| 3579 6 3589 | 2348 1 2378 | 48 248 25 |
| 1 4 2 | 59 E68 59 | -678 78 3 |
+----------------+-------------------+---------------+
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arkietech
Joined: 31 Jul 2008 Posts: 1834 Location: Northwest Arkansas USA
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Posted: Wed Apr 18, 2012 5:25 pm Post subject: |
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Code: |
*--------------------------------------------------------------------*
| 8 39 349 | 13469 346 1369 | 2 5 7 |
| 2359 2359 3459 | 489-3 7 89-3 |e38 6 1 |
| 6 1 7 | 25 a38 25 | 9 8-3 4 |
|----------------------+----------------------+----------------------|
| 279 279 6 | 13 5 13 | 47 247 8 |
| 235 2358 1358 | 7 9 4 |d36 123 26 |
| 4 37 13 | 68 2 68 | 5 137 9 |
|----------------------+----------------------+----------------------|
| 357 3578 358 | 23468 3468 23678 | 1 9 256 |
| 3579 6 3589 | 238 1 2378 | 48 248 25 |
| 1 4 2 | 59 b68 59 |c678 78 3 |
*--------------------------------------------------------------------*
(3=8)r3c5-(8=6)r9c5-r9c7=(6-3)r5c7=(3)r2c7 => r2c46,r3c8<>3 |
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Clement
Joined: 24 Apr 2006 Posts: 1111 Location: Dar es Salaam Tanzania
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Posted: Fri Apr 20, 2012 1:27 pm Post subject: au tough 4/16/12 |
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After the Basics Code: |
+----------------+------------------+-------------+
| 8 39 349 | 13469 3469 1369 | 2 5 7 |
| 2359 2359 3459 | 3489 7 389 | 38 6 1 |
| 6 1 7 | 25 38 25 | 9 38 4 |
+----------------+------------------+-------------+
| 279 279 6 | 13 5 13 | 47 24-7 8 |
| 235 2358 1358 | 7 9 4 | 36 123 26 |
| 4 37 13 | 68 2 68 | 5 13-7 9 |
+----------------+------------------+-------------+
| 357 3578 358 | 23468 3468 23678 | 1 9 256 |
| 3579 6 3589 | 238 1 2378 | 48 248 25 |
| 1 4 2 | 59 68 59 | 6-78 78 3 |
+----------------+------------------+-------------+
| XY-Wing 478 pivoted in r8c7; r46c8<>7 and r9c7<>7 reduces to the following grid Code: |
+----------------+------------------+-------------+
| 8 39 349 | 13469 3469 169 | 2 5 7 |
| 2359 2359 3459 | 3489 7 389 | 38 6 1 |
| 6 1 7 | 25 3-8 25 | 9 38 4 |
+----------------+------------------+-------------+
| 29 29 6 | 13 5 13 | 7 4 8 |
| 35 358 158 | 7 9 4 | 36 12 26 |
| 4 7 13 | 68 2 68 | 5 13 9 |
+----------------+------------------+-------------+
| 357 358 358 | 23468 3468 23678 | 1 9 256 |
| 3579 6 3589 | 238 1 2378 | 4 28 25 |
| 1 4 2 | 59 68 59 | 68 7 3 |
+----------------+------------------+-------------+
| Sashimi finned x-wing on 8 in row 29; r3c5<>8 which solves it. |
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