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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Mon Nov 23, 2009 5:55 pm Post subject: Puzzle NR 09/11/23 (A) |
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I know ... Monday puzzles are always too easy.
| Code: | +-----------------------+
| 8 . . | 2 . . | . . 3 |
| . 5 . | 9 . 8 | . . . |
| . . . | . . . | 5 . . |
|-------+-------+-------|
| 5 9 . | . 2 4 | . 8 . |
| . . . | 3 5 . | 1 . . |
| . 3 . | 8 . 6 | . . 4 |
|-------+-------+-------|
| . . 6 | . 8 . | 2 . 9 |
| . . . | 4 . . | . 1 . |
| 4 . . | . . 2 | 6 . . |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Nov 24, 2009 6:00 am Post subject: |
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| Quote: | | I know ... Monday puzzles are always too easy. |
Easy for you to say. 
This was the classic BBDB for me. Using my typical scattershot approach and playing any move I saw, I made eight moves, plus three pincer transports from those moves, before a BUG+1 put me out of my misery.
But, I had an hour to kill and this filled the time.
Will, as often happens, there be another post telling how it was an easy one-stepper?  |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Wed Nov 25, 2009 7:28 pm Post subject: |
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| Code: | +------------------+-------------------+-------------+
| 8 6 47(1) | 2 47(1) 5 | 479 79 3 |
| 237 5 2347 | 9 347 8 | 47 6 1 |
| 1379 147 13479 | 6 1347 (17) | 5 2 8 |
+------------------+-------------------+-------------+
| 5 9 7(1) | 7(1) 2 4 | 3 8 6 |
| 6 48 48 | 3 5 79 | 1 79 2 |
| 127 3 127 | 8 79-1 6 | 79 5 4 |
+------------------+-------------------+-------------+
| 137 17 6 | 5 8 13-7 | 2 4 9 |
| 379 2 3579 | 4 6 39-7 | 8 1 57 |
| 4 178 15789 | (17) 179 2 | 6 3 57 |
+------------------+-------------------+-------------+ |
the above extended w-wing {1,7} eliminates the 7's in r78c6
but notice the part in red is a skyscraper that also eliminates the 1 in r6c5
(7=1)r3c6 - (1)r1c5 = (1)r1c3 - (1)r4c3 = (1)r4c4 - (1=7)r9c4
| Code: | +--------------------+---------------+------------+
| 8 6 (14) | 2 147 5 | 479 79 3 |
| 27 5 234 | 9 347 8 | 47 6 1 |
| 79-1 7(14) 349-1 | 6 1347 7(1) | 5 2 8 |
+--------------------+---------------+------------+
| 5 9 7 | 1 2 4 | 3 8 6 |
| 6 (48) 48 | 3 5 79 | 1 79 2 |
| 12 3 12 | 8 79 6 | 79 5 4 |
+--------------------+---------------+------------+
| 37-1 7(1) 6 | 5 8 3(1) | 2 4 9 |
| 39 2 5 | 4 6 39 | 8 1 7 |
| 4 (18) 189 | 7 19 2 | 6 3 5 |
+--------------------+---------------+------------+ |
there is a finned x-wing on 1's in columns 2 and 6, this eliminates the 1 from r7c1 already.
[x-wing(1)r37c26] = (1)r9c2
but just a little extension off the fin in r9c2 eliminates the 1's in r3c13 as well
[x-wing(1)r37c26] = (1-8)r9c2 = (8-4)r5c2 = (4)r3c2 - (4=1)r1c3 |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Wed Nov 25, 2009 7:32 pm Post subject: |
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See ... Monday puzzles are always too easy!
Three steps ... including an ornery <147> XYZ-Wing. 
Basics, Norm's finned X-Wing, Norm's Skyscraper, basics, XYZ-Wing, and basics to finish.
All advanced steps perform eliminations in <1> until [r6c1]=1 is left as a Hidden Single in [c1]. |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Tue Dec 01, 2009 3:31 pm Post subject: |
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I started with the skyscraper on 1,
Remote Pair 79 deletes 7 in r1c5,
xy-wing -137 plus some transports,
coloring on 1,
xy-wing -147 completes the puzzle.
A fun puzzle with multiple options mostly involving the digit 1.
Ted |
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