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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Mon Apr 12, 2010 2:11 pm Post subject: Puzzle 10/04/12 (A) |
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| Code: | +-----------------------+
| 8 . 5 | 4 6 . | . . 1 |
| . 6 . | . . . | 4 . . |
| 1 . 4 | . . 5 | . . 3 |
|-------+-------+-------|
| 5 . . | 2 4 . | . 1 . |
| 4 . . | 7 . 6 | . . 8 |
| . . 2 | . 1 8 | . . . |
|-------+-------+-------|
| . 1 . | . . . | . . . |
| . . . | 6 . . | . 3 2 |
| 2 . 6 | . 8 . | . 5 9 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Mon Apr 12, 2010 4:13 pm Post subject: |
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Four steps.
| Quote: | ER 3 with hinge in b4 and strong link r1c26; r4c6<>3,
ER 3 with hinge in b2 and strong link r25c5; rrc2<>3,
UR13 in r29c46 forms pseudocell 278,
Combine with 78 in r2c8 to form ALS 278,
ALS278[(7)r2c68 = (2)r2c6]r2c468 - (2=7_r7c6 - r7c13 = (7)r8c1; r2c1<>7
(Fun step, but not very useful!)
xy-wing -237 with vertex 37 in r1c6. |
Ted |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Mon Apr 12, 2010 6:59 pm Post subject: |
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Three steps with a nice closing xy-chain...
| Quote: | Kite(3); r5c3<>3
Colouring(3); r4c6<>3
xy-chain (3=7)r1c6-(7=9)r1c8-(9=4)r6c8-(4=7)r6c9-(7=3)r6c2; r1c2<>3 |
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Tue Apr 13, 2010 1:06 pm Post subject: |
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Peter,
Isn't that first elimination of 3 from r5c2 and not r5c3 ? I have it after basics that r5c3 is already 1 ? Either way its a neat solve path. |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Tue Apr 13, 2010 2:24 pm Post subject: |
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| Mogulmeister wrote: | Peter,
Isn't that first elimination of 3 from r5c2 and not r5c3 ? I have it after basics that r5c3 is already 1 ? Either way its a neat solve path. |
Quite right. I should read back what I write.. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Apr 13, 2010 3:39 pm Post subject: |
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| I had a miserable time with this one and used eight steps. |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Tue Apr 13, 2010 4:56 pm Post subject: |
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Danny -- one of you best bbdb's  |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Tue Apr 13, 2010 5:02 pm Post subject: |
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| If you don't catch the ERs at the beginning, like Ted, then I'm sure this puzzle could be a bear. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Apr 13, 2010 5:05 pm Post subject: |
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| daj95376 wrote: | | If you don't catch the ERs at the beginning, like Ted, then I'm sure this puzzle could be a bear. |
ERs on 3 and 9 were my first moves and it was still a bear.  |
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