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Puzzle 10/08/20: B

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Fri Aug 20, 2010 7:15 am    Post subject: Puzzle 10/08/20: B Reply with quote
Code:
 +-----------------------+
 | 7 . . | . . . | 8 . . |
 | . . . | . . . | . 1 . |
 | 6 . 2 | . . 7 | . . 3 |
 |-------+-------+-------|
 | . . . | 4 . . | . . . |
 | . . . | . 3 . | . . 6 |
 | . . 3 | . . 2 | . . 9 |
 |-------+-------+-------|
 | 2 . 6 | . . . | . 5 . |
 | . 1 . | 5 . 3 | 4 . . |
 | . 4 . | . 6 8 | . . . |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Fri Aug 20, 2010 2:43 pm    Post subject: Reply with quote
Another fun puzzle just taking them as they jump out at me...........

1. AUR (19)r45c16; external cell implications: r6c1=1, r4c5=9, r5c4=9
(1)r6c1; r4c1<>1
||
(9)r4c5-(9=1)r4c6; r4c1<>1
||
(9)r5c4-(9=1)r4c6; r4c1<>1
which opens up a

2. Type 2 UR (89)r48c13; r5c3<>7
ALso looking at the external cell implications: r4c5=8,r5c3=9 & r8c5=9
(8)r4c5-(8=57)r6c25-(7)r6c7=r5c7-(7=9)r5c4; r5c6<>9
||
r5c3=9; r5c6<>9
||
(9)r8c5-r7c4=(9)r5c4; r5c6<>9

3. w-wing 35 r2c2 & r9c1 SL (5)r29c3; r2c1,r7c2<>3

Ted
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK
PostPosted: Fri Aug 20, 2010 4:54 pm    Post subject: Reply with quote
Two wings...
Quote:
m-wing(79) with pseudocell (9=5)r1c2-(5=7)r6c2 - r7c2=(7-9)r7c4=r8c5 ; r1c5<>9
w-wing(35) (3=5)r2c2 - r6c2=r6c1 - (5=3)r9c1 ; r2c1<>3, r7c2<>3

Ted, good work on the AURs! You obviously approach it like Chopin Etudes - today I will play using chromatic scales... or AURs or m-wings..
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sat Aug 21, 2010 9:45 pm    Post subject: Reply with quote
If Ted approached it like Chopin etudes, then I approached it like a cat walking across the keyboard. I used a half-dozen conventional moves. Interspersed were a naked pair and triple which I should've found earlier, so I don't know how that affected my solution. I'm not doing it again to find out.

Too few givens, too many basics. Laughing
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