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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Sat Feb 28, 2009 4:18 pm Post subject: Set L Puzzle 31 |
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| Code: | +-----------------------+
| 8 . 4 | 7 . . | 6 5 . |
| . 7 . | . . . | . . . |
| 1 . 5 | . 2 . | . . . |
|-------+-------+-------|
| 7 . . | . 6 2 | 4 . . |
| . . 6 | 4 1 . | 9 7 . |
| . . . | 9 . . | . . . |
|-------+-------+-------|
| 4 . . | 8 7 . | 5 . . |
| 2 . . | . 5 . | . . 6 |
| . . . | . . . | . 3 8 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sun Mar 01, 2009 9:58 pm Post subject: |
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Danny, you seem to be in a BBDB groove! I found many opportunities is this puzzle but I it still required me eight steps. I was trying to work with bivalues more, but I had to go back to single digit techniques a couple of times. One interesting step was skyscraper that did not produce any direct eliminations, but transporting a pincer did the trick.
Ted  |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Mon Mar 02, 2009 7:03 am Post subject: |
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| tlanglet wrote: | | Danny, you seem to be in a BBDB groove! |
Yes. Is this a positive observation? |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Mon Mar 02, 2009 8:35 am Post subject: |
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this puzzle is definitely for the collectors.
I think my eyes started seeing things trying to go through the countless continous loops in this.
| Code: | .---------------------.---------------------.---------------------.
| 8 239 4 | 7 39 13 | 6 5 1239 |
| 69 7 239 | 1356 389 58 | 23 129 4 |
| 1 369 5 | 36 2 4 | 38 89 7 |
:---------------------+---------------------+---------------------:
| 7 189 189 | 35 6 2 | 4 18 35 |
| 35 28 6 | 4 1 58 | 9 7 235 |
| 35 4 128 | 9 38 7 | 238 6 1235 |
:---------------------+---------------------+---------------------:
| 4 136 13 | 8 7 136 | 5 29 29 |
| 2 1389 13789 | 13 5 139 | 17 4 6 |
| 69 5 179 | 2 4 169 | 17 3 8 |
'---------------------'---------------------'---------------------' |
this first move was the breaker...
(8)r4c8 = (8)r4c23 - (8=2)r5c2 - (2)r1c2 = (2)r2c3 - (2=3)r3c7 - (3=8)r3c7; r6c7 <> 8
some singles...
xy-chain... (3=8)r6c5 - (8=5)r5c6 - (5=2)r5c9 - (2=3)r1c9; r1c5 <> 3
x-wing 3, removes 3 from r2c34
xy-wing {1,6,9} removes 9 from r8c2
----
and yes this is a positive comment. |
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