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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Sat Sep 27, 2008 7:13 pm Post subject: No Rating: Puzzle CD_26 |
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Final act of redemption.
| Code: | +-----------------------+
| 9 . . | . . 6 | . . . |
| . 5 . | . 1 2 | . . . |
| . . 8 | . . . | . 3 . |
|-------+-------+-------|
| . . . | 4 6 . | . 5 9 |
| . 9 . | 8 3 . | . . . |
| 5 6 . | . . 1 | 8 4 . |
|-------+-------+-------|
| . . . | . . 9 | 5 . . |
| . . 9 | 2 . 3 | . . 8 |
| . . . | 1 . . | . 9 4 |
+-----------------------+
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sat Sep 27, 2008 9:22 pm Post subject: |
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| This gave me more trouble than the others. I played a half-dozen ordinary moves before reaching an impasse. I had to resort to a 13-13-18-18-38-38 DP. There were two numbers that could kill it; one led to a contradiction and the other solved it. I suspect the more advanced players could find better solutions. |
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nataraj
Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
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| Posted: Sat Sep 27, 2008 9:55 pm Post subject: |
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This is where I stand after basics:
| Code: |
+--------------------------+--------------------------+--------------------------+
| 9 137 123 | 57 8 6 | 4 12 125 |
| 4 5 6 | 3 1 2 | 9 8 7 |
| 127 17 8 | 57 9 4 | 126 3 1256 |
+--------------------------+--------------------------+--------------------------+
| 38 138 123 | 4 6 7 | 12 5 9 |
| 12 9 4 | 8 3 5 | 1267 1267 126 |
| 5 6 7 | 9 2 1 | 8 4 3 |
+--------------------------+--------------------------+--------------------------+
| 38 1378 13 | 6 4 9 | 5 127 12 |
| 17 4 9 | 2 5 3 | 167 167 8 |
| 6 2 5 | 1 7 8 | 3 9 4 |
+--------------------------+--------------------------+--------------------------+
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A type 4 UR ( 38 ) gets rid of 3 in r47c2, which leaves a naked single 3 in r1c2.
After cleanup and some coloring on 2, there are a couple w-wings (12) in this position:
(1) r1c3=r7c9 via col 8 and
(1) r1c8=r4c7 via col 3
| Code: |
+--------------------------+--------------------------+--------------------------+
| 9 3 12 | 7 8 6 | 4 12 5 |
| 4 5 6 | 3 1 2 | 9 8 7 |
| 127 17 8 | 5 9 4 | 16 3 126 |
+--------------------------+--------------------------+--------------------------+
| 38 18 123 | 4 6 7 | 12 5 9 |
| 12 9 4 | 8 3 5 | 1267 167 16 |
| 5 6 7 | 9 2 1 | 8 4 3 |
+--------------------------+--------------------------+--------------------------+
| 38 178 13 | 6 4 9 | 5 127 12 |
| 17 4 9 | 2 5 3 | 167 167 8 |
| 6 2 5 | 1 7 8 | 3 9 4 |
+--------------------------+--------------------------+--------------------------+ |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sun Sep 28, 2008 10:13 pm Post subject: |
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Unless I made a silly error, I finished it off with a kite on <2> in box 4 to delete the <2> in r3c7 and a w-wing <12> with strong link on <2> in col 3 to delete <1> from r3c7 & r5c8.
Ted |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sun Sep 28, 2008 10:23 pm Post subject: |
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| nataraj wrote: |
A type 4 UR ( 38 ) gets rid of 3 in r47c2, which leaves a naked single 3 in r1c2.
After cleanup and some coloring on 2, there are a couple w-wings (12) in this position:
(1) r1c3=r7c9 via col 8 and
(1) r1c8=r4c7 via col 3
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Nataraj, I just read your comments and I suspect that your coloring on <2> is effectively the same as my kite, and I used your second w-wing option to finish up.
Ted |
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