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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Fri Apr 09, 2010 4:27 am Post subject: Puzzle 10/04/09 (D) |
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Friday sans <8> in givens
| Code: | +-----------------------+
| 5 4 3 | . . . | . . 2 |
| 7 . . | . 2 . | . . . |
| 1 . . | 3 . . | 6 . . |
|-------+-------+-------|
| . . 5 | 4 . . | . . . |
| . 2 . | . 6 9 | 4 . . |
| . . . | . 5 2 | . . 7 |
|-------+-------+-------|
| . . 6 | . 4 . | . 5 1 |
| . . . | . . . | 9 3 . |
| 9 . . | . . 3 | 7 . . |
+-----------------------+
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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: Fri Apr 09, 2010 5:47 pm Post subject: |
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If you like URs, U R in heaven with this puzzle, except
| Quote: | | it is a one stepper using a Type 1 UR1 in r14c67 |
Ted |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Fri Apr 09, 2010 11:38 pm Post subject: |
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| Ted: Lucky elimination because a UR can't be in two chutes -- bands/stacks -- but r14c67 covers bands 1&2 (stacks 2&3). |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sat Apr 10, 2010 1:01 am Post subject: |
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| daj95376 wrote: | | Ted: Lucky elimination because a UR can't be in two chutes -- bands/stacks -- but r14c67 covers bands 1&2 (stacks 2&3). |
My turn 
That is rule #1. I just saw the UR structure and jumped on it without enough attention.
Ted |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sat Apr 10, 2010 5:01 am Post subject: |
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| Type 1 UR (79), two short XY-Chains and an XY-Wing (189). Not sure if the UR contributed anything. |
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peterj
Joined: 26 Mar 2010
Posts: 974
Location: London, UK
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| Posted: Sat Apr 10, 2010 10:53 am Post subject: |
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No 8 givens and most of my moves were in 8s..
| Quote: | multi-colour traps on 8
swordfish on 8
xy-wing(189)
Also played the UR1(79) but dont think it helped |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sat Apr 10, 2010 2:51 pm Post subject: |
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From a mess-up to a fun puzzle.
Finned xy-wing 1-89 with vertex 19 in r6c2, pincer 18 in r5c3, pincer 89 in r3c2 and fin 8 in r6c2.
If xy-wing is true, r2c3<>8
If fin is true: (8)r6c2 - r6c4 = (8)r2c4; r2c3<>8
Type 1 UR79 forces r3c8=4 to complete the puzzle. (Here, the UR79 is required.)
Ted |
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