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dongrave
Joined: 06 Mar 2014
Posts: 568
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 Posted: Thu Jul 12, 2018 11:13 pm Post subject: Helmut's 07/12/18 Advanced |
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Another one that was a lot of fun! I used my favorite method again to solve it.
| Code: |
+-------+-------+-------+
| . . . | . . . | . . . |
| 9 . . | . 5 . | . 2 3 |
| . . 7 | 2 3 9 | . 1 . |
+-------+-------+-------+
| 6 . . | 3 . . | 5 . . |
| . 1 . | . 9 . | . 6 . |
| . . 3 | . . 4 | . . 2 |
+-------+-------+-------+
| . 6 . | 7 4 5 | 8 . . |
| 7 8 . | . 1 . | . . 5 |
| . . . | . . . | . . . |
+-------+-------+-------+
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ZeroAssoluto
Joined: 05 Feb 2017
Posts: 941
Location: Rimini, Italy
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| Posted: Fri Jul 13, 2018 1:00 pm Post subject: |
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Hi everyone,
W-Wing 3,9 in r7c8,r9c2 connected by number 9 in r6c28 and -3 in r7c1,r9c8
Ciao Gianni |
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dongrave
Joined: 06 Mar 2014
Posts: 568
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| Posted: Sat Jul 14, 2018 12:25 pm Post subject: |
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Grid after basics.
| Code: |
+-------------+-------------+----------------+
| 123 23 12 | 4 67 67 | 9 5 8 |
| 9 4 6 | 1 5 8 | 7 2 3 |
| 8 5 7 | 2 3 9 | 46 1 46 |
+-------------+-------------+----------------+
| 6 279 249 | 3 278 1 | 5 4789 479 |
| 24 1 8 | 5 9 27 | 3 6 47 |
| 5 79 3 | 68 678 4 | 1 789 2 |
+-------------+-------------+----------------+
| 123 6 129 | 7 4 5 | 8 39 19 |
| 7 8 49 | 69 1 236 | 246 349 5 |
| 134 39 5 | 689 268 236 | 246 3479 14679 |
+-------------+-------------+----------------+
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(9=4)r8c3-(4=39)r78c8-9r6c8=r6c2=>r9c2<>9! |
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immpy
Joined: 06 May 2017
Posts: 571
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| Posted: Wed Jul 18, 2018 12:25 am Post subject: |
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Kudos to you dongrave for your chain/loop savvy. I don't even pretend to get a grip on those things...lol. Different strokes for different folks, as they say. Much preferred the W-Wing approach as per Gianni.
cheers...immp |
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dongrave
Joined: 06 Mar 2014
Posts: 568
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| Posted: Wed Jul 18, 2018 12:57 am Post subject: |
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| immpy wrote: | Kudos to you dongrave for your chain/loop savvy. I don't even pretend to get a grip on those things...lol. Different strokes for different folks, as they say. Much preferred the W-Wing approach as per Gianni.
cheers...immp |
Ha! Thanks immpy! I know what you mean! You know what? I heard that Keith doesn't use pencil marks! I've thought about asking a doctor to visit him sometime!  |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Wed Aug 08, 2018 3:12 pm Post subject: |
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I try not to use pencil marks. But I do use them on occasion, especially for VH and Advanced puzzles. It's a way to make easier puzzles a little more challenging.
I start by putting in PMs only for cells that have two candidates. That will find XY-wings, etc.
Since I developed the idea of patterns of cells where useful strong links can lie, I have become quite good at finding skyscrapers and kites with no PMs.
Keith |
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