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More Eureka

 
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Marty R.



Joined: 12 Feb 2006
Posts: 5160
Location: Rochester, NY, USA

PostPosted: Sun Nov 04, 2012 5:49 am    Post subject: More Eureka Reply with quote

Ted's been teaching me off-line, but he's gone for a while and I hope someone else can help in his absence.

Code:

+------------+------------+----------+
| 4  3   8   | 5   7  1   | 9 2   6  |
| 6  1   7   | 8   2  9   | 3 5   4  |
| 2  5   9   | 36  46 346 | 8 7   1  |
+------------+------------+----------+
| 19 269 3   | 126 8  46  | 7 49  5  |
| 7  289 124 | 123 45 345 | 6 349 28 |
| 5  268 246 | 236 9  7   | 1 34  28 |
+------------+------------+----------+
| 3  4   5   | 7   1  8   | 2 6   9  |
| 8  7   26  | 9   56 256 | 4 1   3  |
| 19 269 126 | 4   3  26  | 5 8   7  |
+------------+------------+----------+

Play this puzzle online at the Daily Sudoku site

I can do a simple W-Wing with one strong link, but I don't know how to do this one other than I think the start and end should be (4=6) and (6=4).

It's the W-Wing on 46 in r3c5 and r4c6 with SL 6 in c4. Those can be used for an M-Wing as well, but I think I know to do that one.
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arkietech



Joined: 31 Jul 2008
Posts: 1723
Location: Northwest Arkansas USA

PostPosted: Sun Nov 04, 2012 2:31 pm    Post subject: Reply with quote

Code:
+------------+------------+----------+
| 4  3   8   | 5   7  1   | 9 2   6  |
| 6  1   7   | 8   2  9   | 3 5   4  |
| 2  5   9   |b36 a46 346 | 8 7   1  |
+------------+------------+----------+
| 19 269 3   |b126 8 c46  | 7 49  5  |
| 7  289 124 | 123 45 345 | 6 349 28 |
| 5  268 246 |b236 9  7   | 1 34  28 |
+------------+------------+----------+
| 3  4   5   | 7   1  8   | 2 6   9  |
| 8  7   26  | 9   56 256 | 4 1   3  |
| 19 269 126 | 4   3  26  | 5 8   7  |
+------------+------------+----------+
(4=6)r3c5-6r46c4=6r3c4-(6=4)r3c5 => -4r5c5
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daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Sun Nov 04, 2012 3:46 pm    Post subject: Reply with quote

Correcting Dan's typos:

Code:
W-Wing:  (4=6)r3c5 - r3c4 = r46c4 - (6=4)r4c6  =>  r3c6,r5c5<>4
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Marty R.



Joined: 12 Feb 2006
Posts: 5160
Location: Rochester, NY, USA

PostPosted: Sun Nov 04, 2012 4:27 pm    Post subject: Reply with quote

Thanks very much Dan and Danny.
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