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AThiker
Joined: 01 May 2007
Posts: 6
Location: Taipei
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 Posted: Tue May 01, 2007 7:13 am Post subject: March 3, 2007 |
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+-----------+-----------+-------------+
| 8 7 2 | 6 5 14 | 13 9 34 |
| 459 14 6 | 7 19 3 | 8 145 2 |
| 459 3 15 | 49 8 2 | 6 145 7 |
+-----------+-----------+-------------+
| 3 6 9 | 5 4 8 | 2 7 1 |
| 1 8 4 | 2 3 7 | 9 6 5 |
| 2 5 7 | 1 6 9 | 4 3 8 |
+-----------+-----------+-------------+
| 7 14 8 | 3 2 6 | 15 145 9 |
| 456 2 3 | 49 19 145 | 7 8 46 |
| 456 9 15 | 8 7 45 | 135 2 346 |
+-----------+-----------+-------------+
Any ideas or techniques to solve this one will be appreciated |
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Angel
Joined: 26 Mar 2006
Posts: 31
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| Posted: Tue May 01, 2007 11:02 am Post subject: Re: March 3, 2007 |
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| Code: | +-----------+-----------+-------------+
| 8 7 2 | 6 5 14 | 13 9 34 |
| 459 14 6 | 7 19 3 | 8 145 2 |
| 459 3 15 | 49 8 2 | 6 145 7 |
+-----------+-----------+-------------+
| 3 6 9 | 5 4 8 | 2 7 1 |
| 1 8 4 | 2 3 7 | 9 6 5 |
| 2 5 7 | 1 6 9 | 4 3 8 |
+-----------+-----------+-------------+
| 7 14 8 | 3 2 6 | 15 145 9 |
| 456 2 3 | 49 19 145 | 7 8 46 |
| 456 9 15 | 8 7 45 | 135 2 346 |
+-----------+-----------+-------------+ |
The only places for a 5 in row 7 is in box 9, so eliminate 5 from r9c7.
So r7c7=5
| Code: | +-----------+-----------+-------------+
| 8 7 2 | 6 5 14 | 13 9 34 |
| 459 14 6 | 7 19 3 | 8 145 2 |
| 459 3 15 | 49 8 2 | 6 145 7 |
+-----------+-----------+-------------+
| 3 6 9 | 5 4 8 | 2 7 1 |
| 1 8 4 | 2 3 7 | 9 6 5 |
| 2 5 7 | 1 6 9 | 4 3 8 |
+-----------+-----------+-------------+
| 7 14 8 | 3 2 6 | 5 14 9 |
| 456 2 3 | 49 19 145 | 7 8 46 |
| 456 9 15 | 8 7 45 | 13 2 346 |
+-----------+-----------+-------------+ |
xy-wing (r2c2, r2c5, r3c4) removes 4 from r3c1.
xy-wing (r7c2, r9c3, r9c6) removes 4 from r9c1
| Code: | +-----------+-----------+-------------+
| 8 7 2 | 6 5 14 | 13 9 34 |
| 459 14 6 | 7 19 3 | 8 145 2 |
| 59 3 15 | 49 8 2 | 6 145 7 |
+-----------+-----------+-------------+
| 3 6 9 | 5 4 8 | 2 7 1 |
| 1 8 4 | 2 3 7 | 9 6 5 |
| 2 5 7 | 1 6 9 | 4 3 8 |
+-----------+-----------+-------------+
| 7 14 8 | 3 2 6 | 5 14 9 |
| 456 2 3 | 49 19 145 | 7 8 46 |
| 56 9 15 | 8 7 45 | 13 2 346 |
+-----------+-----------+-------------+ |
x-wing on 4s removes 4 from r8c6 and r8c9 (and places 6s in rows 8 and 9)
| Code: | +-----------+-----------+-------------+
| 8 7 2 | 6 5 14 | 13 9 34 |
| 459 14 6 | 7 19 3 | 8 145 2 |
| 59 3 15 | 49 8 2 | 6 145 7 |
+-----------+-----------+-------------+
| 3 6 9 | 5 4 8 | 2 7 1 |
| 1 8 4 | 2 3 7 | 9 6 5 |
| 2 5 7 | 1 6 9 | 4 3 8 |
+-----------+-----------+-------------+
| 7 14 8 | 3 2 6 | 5 14 9 |
| 45 2 3 | 49 19 15 | 7 8 6 |
| 6 9 15 | 8 7 45 | 13 2 34 |
+-----------+-----------+-------------+ |
xy-wing (r3c4, r3c1, r8c1) removes 4 from r8c4.
That should leave a smooth finish. |
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AThiker
Joined: 01 May 2007
Posts: 6
Location: Taipei
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| Posted: Tue May 01, 2007 1:35 pm Post subject: |
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| Thanks, I cannot believe I missed that 5. That is usually the 1st thing I look for. I guess an early rise for a crowed flight with crying babies breaks the concentration a bit. Guess I will save the very hard ones for quite time. |
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