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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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 Posted: Fri Apr 18, 2008 7:59 am Post subject: competition #1013 plus |
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| Code: | +-------+-------+-------+
| 1 . 4 | . . . | . . 8 |
| . . 7 | 8 6 . | 2 1 . |
| . 5 . | . . . | . . . |
+-------+-------+-------+
| . . . | . 1 8 | . 6 . |
| . . . | 6 . 2 | . . 7 |
| . 6 . | 3 4 . | . . . |
+-------+-------+-------+
| . . . | . . . | . 4 . |
| . 4 2 | . 8 6 | 9 . . |
| 3 . . | . . . | 8 . 5 |
+-------+-------+-------+ |
I found two advanced moves to resolve it. any one step moves? i didn't see any handy w-wings or m-wings in this one
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here is the daily telegraph 4/18
| Code: | +-------+-------+-------+
| . 5 1 | . . . | . 3 . |
| . . 9 | 7 2 . | . . . |
| . . . | . . 6 | . 8 . |
+-------+-------+-------+
| 5 9 . | . . . | . . 6 |
| 2 . . | 1 7 4 | . . 3 |
| 3 . . | . . . | . . 4 |
+-------+-------+-------+
| . 7 . | 5 . . | . . . |
| . . . | . 4 7 | 6 . . |
| . 2 . | . . . | 3 4 . |
+-------+-------+-------+ |
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and here is the vanhegan extreme today which isn't as extreme as it can be, in fact all his puzzles today were short and sweet for some reason.
| Code: | +-------+-------+-------+
| . . 6 | 8 . . | . 2 . |
| 8 4 . | 1 7 . | . 6 . |
| 2 3 . | . . . | . . . |
+-------+-------+-------+
| . 2 3 | . . . | . . 7 |
| . . . | 3 . 7 | . . . |
| 5 . . | . . . | 1 3 . |
+-------+-------+-------+
| . . . | . . . | . 4 6 |
| . 5 . | . 2 8 | . 1 9 |
| . 9 . | . . 5 | 3 . . |
+-------+-------+-------+ |
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nataraj
Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
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| Posted: Fri Apr 18, 2008 8:05 pm Post subject: |
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Two advanced moves:
UR (14) gives r9c2=1, and
xy-wing (37-17-13) solves r3c9=9.
Neither of them is sufficient on its own. Couldn't find a nice xy-chain either.
Coloring removes 5 from r5c1 but doesn't help the solution at all.
This is the position after basics:
| Code: |
+--------------------------+--------------------------+--------------------------+
| 1 2 4 | 79 379 379 | 6 5 8 |
| 9 3 7 | 8 6 5 | 2 1 4 |
| 6 5 8 | 14 2 14 | 37 379 39 |
+--------------------------+--------------------------+--------------------------+
| 2457 79 359 | 579 1 8 | 345 6 239 |
| 458 189 1359 | 6 59 2 | 1345 389 7 |
| 2578 6 159 | 3 4 79 | 15 89 129 |
+--------------------------+--------------------------+--------------------------+
| 578 1789 159 | 2 3579 1379 | 17 4 6 |
| 57 4 2 | 157 8 6 | 9 37 13 |
| 3 179 6 | 1479 79 1479 | 8 2 5 |
+--------------------------+--------------------------+--------------------------+
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play online |
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Asellus
Joined: 05 Jun 2007
Posts: 865
Location: Sonoma County, CA, USA
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| Posted: Fri Apr 18, 2008 9:49 pm Post subject: |
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I couldn't find anything less than the XY Wing and UR for the first puzzle.
However, that Vanhagen extreme is a one-step puzzle (for those on the move!). |
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Johan
Joined: 25 Jun 2007
Posts: 206
Location: Bornem Belgium
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| Posted: Sat Apr 19, 2008 10:26 pm Post subject: |
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I used the 39 UR* in R17C56 to solve the extreme, either R1C5=5 or R7C56=1 to avoid the <39>DP,in both options they eliminate <1> in R1C2 and R5C3
R1C5=(5) => R3C456=469 => R3C3=(1)(a)
R7C56=|1| => R7C1=|7| => R1C2=|7| => R6C2=|6| => R5C2=|1|(b)
| Code: |
+-------------------------+-------------------------+-------------------------+
| 179 -1|7| 6 | 8 * 3(5)9 * 39 | 4 2 15 |
| 8 4 5 | 1 7 2 | 9 6 3 |
| 2 3 a (1)9 | 4-(5)9 4-(5)69 469 | 8 7 15 |
+-------------------------+-------------------------+-------------------------+
| 149 2 3 | 459 8 149 | 6 59 7 |
| 149 b |1|6 -189 | 3 14569 7 | 2 59 48 |
| 5 |6|7 789 | 2 469 469 | 1 3 48 |
+-------------------------+-------------------------+-------------------------+
| 1|7| 8 2 | 79 *|1|39 *|1|39 | 5 4 6 |
| 3 5 4 | 6 2 8 | 7 1 9 |
| 6 9 17 | 47 14 5 | 3 8 2 |
+-------------------------+-------------------------+-------------------------+ |
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Asellus
Joined: 05 Jun 2007
Posts: 865
Location: Sonoma County, CA, USA
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| Posted: Sun Apr 20, 2008 12:08 am Post subject: |
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<1> eliminations were also key to my one-step solution. But, I did it differently.
There is a "useless" XYZ Wing in r17c1 and r3c3. The <1> in r3c3 can be transported to r5c2, eliminating <1> from r45c1. |
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ravel
Joined: 21 Apr 2006
Posts: 536
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| Posted: Sun Apr 20, 2008 9:54 am Post subject: |
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| The simple way is to use the w-wing 17. |
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