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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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 Posted: Sun Feb 27, 2011 6:07 am Post subject: Daily Sudoku Competition for Feb 25, 2011 |
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004000031000020004000003007008450700060000040002076900600107000400090000217000800
| Code: |
+-------+-------+-------+
| . . 4 | . . . | . 3 1 |
| . . . | . 2 . | . . 4 |
| . . . | . . 3 | . . 7 |
+-------+-------+-------+
| . . 8 | 4 5 . | 7 . . |
| . 6 . | . . . | . 4 . |
| . . 2 | . 7 6 | 9 . . |
+-------+-------+-------+
| 6 . . | 1 . 7 | . . . |
| 4 . . | . 9 . | . . . |
| 2 1 7 | . . . | 8 . . |
+-------+-------+-------+
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Sun Feb 27, 2011 12:07 pm Post subject: |
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Another "simple" ALS move ... xy-wing with als pivot...
| Quote: | | (2=6)r4c9 - anp(6=35)r8c39 - (5=2)r8c6 ; r4c6<>2 |
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JV
Joined: 09 Jan 2011
Posts: 24
Location: Devon, England
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| Posted: Sun Feb 27, 2011 4:49 pm Post subject: |
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I can't begin to match Peter's nice move.
The old-fashoned way: SFish in 5s (or loop of 5s), followed by simple colouring on 5, followed by xy-wing. |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sun Feb 27, 2011 5:52 pm Post subject: |
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Lots of moves available; took me awhile to find a special one......
After basics:
| Code: | *-----------------------------------------------------------*
| 589 579 4 | 5789 6 589 | 2 3 1 |
| 389 379 6 | 789 2 1 | 5 89 4 |
| 589 2 1 | 589 4 3 | 6 89 7 |
|-------------------+-------------------+-------------------|
| 139 39 8 | 4 5 9-2 | 7 126 #26 |
| 7 6 59 | 289 1 289 | 3 4 25 |
| 15 4 2 | 3 7 6 | 9 15 8 |
|-------------------+-------------------+-------------------|
| 6 59 359 | 1 8 7 | 4 25 235 |
| 4 8 35 | 256 9 #25 | 1 7 56=3 |
| 2 1 7 | 56 3 4 | 8 56 9 |
*-----------------------------------------------------------* |
AXY-wing (-256) vertex (56)r8c9, pincers (26)r4c9 & (25)r8c6 with fin (3)r8c9; r4c6<>2=9
If the fin is true: (3)r8c9-(3=5)r8c3-r5c3=(5-2)r5c9=(2)r4c89
Ted |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sun Feb 27, 2011 5:56 pm Post subject: |
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So, I just read the other posts and found that I made the identical deletion as Peter using some of the same linkage but viewed the code in a totally different pattern. The wonders of Sudoku...........
Ted |
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