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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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 Posted: Thu Dec 01, 2011 10:40 pm Post subject: Dec 2 VH |
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Finned x-wing 8 in c35; r6c4<>8 solves it.
Also the w-wing 38 with strong link 8 in col 4; r5c1<>3. |
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rgmerk76
Joined: 02 Dec 2011
Posts: 1
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| Posted: Fri Dec 02, 2011 12:05 am Post subject: |
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| Fairly straightforward BUG+1 solution for me after basics - or did I stuff up? |
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kuskey
Joined: 10 Dec 2008
Posts: 141
Location: Pembroke, NH
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| Posted: Fri Dec 02, 2011 5:57 am Post subject: Dec 2 VH |
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| Another 1-stepper is the 378 xy-wing with pivot at r6c4 setting r1c3<>7. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Wed Dec 21, 2011 6:05 pm Post subject: |
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After basics (this is for the benefit of a new member if he or she is interested).
| Code: |
+---------+----------+-------+
| 2 4 37 | 37 1 5 | 6 8 9 |
| 1 6 78 | 9 78 4 | 5 2 3 |
| 38 9 5 | 38 6 2 | 4 1 7 |
+---------+----------+-------+
| 7 1 9 | 2 4 6 | 8 3 5 |
| 38 2 4 | 5 38 1 | 9 7 6 |
| 6 5 38 | 78 378 9 | 1 4 2 |
+---------+----------+-------+
| 9 8 6 | 1 2 7 | 3 5 4 |
| 4 3 2 | 6 5 8 | 7 9 1 |
| 5 7 1 | 4 9 3 | 2 6 8 |
+---------+----------+-------+
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Play this puzzle online at the Daily Sudoku site |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Wed Dec 21, 2011 6:47 pm Post subject: |
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After basics: | Code: | +-------------+-------------+-------------+
| 2 4 37 | 37 1 5 | 6 8 9 |
| 1 6 78* | 9 78* 4 | 5 2 3 |
| 38 9 5 | 38 6 2 | 4 1 7 |
+-------------+-------------+-------------+
| 7 1 9 | 2 4 6 | 8 3 5 |
|-38 2 4 | 5 38# 1 | 9 7 6 |
| 6 5 38# | 78 -378 9 | 1 4 2 |
+-------------+-------------+-------------+
| 9 8 6 | 1 2 7 | 3 5 4 |
| 4 3 2 | 6 5 8 | 7 9 1 |
| 5 7 1 | 4 9 3 | 2 6 8 |
+-------------+-------------+-------------+ |
Analysis courtesy of Sudoku Susser:
* Squares R3C4 and R5C5 form a remote naked pair. <38> can be removed from any square that a buddy to both of them.
R2C5 - removing <8> from <78> leaving <7>.
R6C4 - removing <8> from <78> leaving <7>.
OR:
Squares R6C3 (XY), R1C3 (XZ) and R6C4 (YZ) form an XY-Wing pattern on <7>. All squares that are buddies of both the XZ and YZ squares cannot be <7>.
R1C4 - can remove <7> from <37> leaving <3>.
OR:
Squares R6C4 (XY), R1C4 (XZ) and R6C3 (YZ) form an XY-Wing pattern on <3>. All squares that are buddies of both the XZ and YZ squares cannot be <3>.
R1C3 - can remove <3> from <37> leaving <7>.
OR:
A BUG in the puzzle forces R6C5 to be <8>.
There is also a W-wing that I have marked above. No doubt there are other moves of similar difficulty.
Keith |
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George Woods
Joined: 28 Mar 2006
Posts: 304
Location: Dorset UK
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| Posted: Thu Dec 22, 2011 10:12 pm Post subject: the er solution |
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| The strong link in 8 in col 4 denies an 8 at r3c1 Nowhere for an 8 in Box 4) |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Thu Dec 22, 2011 10:36 pm Post subject: Re: the er solution |
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| George Woods wrote: | | The strong link in 8 in col 4 denies an 8 at r3c1 Nowhere for an 8 in Box 4) |
George, I'm sorry, I just don't understand your statements. I do see where that 8 is removed by the Skyscraper in r25. |
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