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Puzzle 10/09/04: B

 
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daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Sat Sep 04, 2010 5:19 am    Post subject: Puzzle 10/09/04: B Reply with quote

Code:
 +-----------------------+
 | 3 . . | . . . | 4 1 . |
 | . 2 . | . 5 . | . . . |
 | . . 7 | . . . | . 3 6 |
 |-------+-------+-------|
 | 2 . . | 6 . . | . . . |
 | . . . | . 9 . | . . . |
 | . . . | . . . | 6 8 . |
 |-------+-------+-------|
 | . . 6 | . 7 2 | 9 . 8 |
 | . 4 . | . . 5 | 3 . . |
 | 1 . 9 | . . . | 7 . 5 |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site
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JC Van Hay



Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium

PostPosted: Sat Sep 04, 2010 10:15 am    Post subject: Reply with quote

Quote:
X Wing (1)R25/c36 : r36c36<>1
Grouped Skyscraper (8)R14 : r3c6<>8
XY Wing (19-4), pivot at R3C2 : => r2c46,r3c1<>4
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK

PostPosted: Sat Sep 04, 2010 11:52 am    Post subject: Reply with quote

A wing...
Quote:
m-wing(49) with pseudocell (9=1)r3c2-(1=4)r2c3 - r3c1=(4-9)r3c6=r1c6 ; r1c2<>9
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JC Van Hay



Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium

PostPosted: Sat Sep 04, 2010 7:14 pm    Post subject: Reply with quote

Peter, would you mind checking the cell R3C1. I have R3C1={489}. TIA.
JC
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daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Sat Sep 04, 2010 7:43 pm    Post subject: Reply with quote

Peter's pseudo-cell is in the first two cells.

Code:
(Y            =X)a    - (X)b = (X-Y)r    = (Y)s

(9=1)r3c2 - (1=4)r2c3 - r3c1 = (4-9)r3c6 = (9)r1c6 ; r1c2<>9

Code:
 +-----------------------------------------------------------------------+
 |  3      59     58     |  78     6      789    |  4      1      2      |
 |  6      2      14     |  34     5      134    |  8      79     79     |
 |  489    19     7      |  28     12     1489   |  5      3      6      |
 |-----------------------+-----------------------+-----------------------|
 |  2      579    3458   |  6      34     3478   |  1      579    3479   |
 |  48     6      13458  |  578    9      13478  |  2      57     347    |
 |  49     1579   1345   |  257    12     1347   |  6      8      3479   |
 |-----------------------+-----------------------+-----------------------|
 |  5      3      6      |  1      7      2      |  9      4      8      |
 |  7      4      2      |  9      8      5      |  3      6      1      |
 |  1      8      9      |  34     34     6      |  7      2      5      |
 +-----------------------------------------------------------------------+
 # 65 eliminations remain

An ALS perspective:

Code:
(Y  =X)a         - (X)b = (X-Y)r    = (Y)s

(9=1=4)r3c2,r2c3 - r3c1 = (4-9)r3c6 = (9)r1c6  =>  r1c2<>9
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JC Van Hay



Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium

PostPosted: Sat Sep 04, 2010 8:06 pm    Post subject: Reply with quote

Danny, Thanks a lot. In fact, it was R3C4 that I should have asked the checking. I had {248} because I overlooked the NP(34)C4. My bad Embarassed . Now, Peter's wing is crystal-clear Exclamation
JC
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ronk



Joined: 07 May 2006
Posts: 398

PostPosted: Sat Sep 04, 2010 8:12 pm    Post subject: Reply with quote

daj95376 wrote:
Peter's pseudo-cell is in the first two cells.

Code:
(Y            =X)a    - (X)b = (X-Y)r    = (Y)s

(9=1)r3c2 - (1=4)r2c3 - r3c1 = (4-9)r3c6 = (9)r1c6 ; r1c2<>9

Or drop the last SL for an h-wing instead: (9=1)r3c2 - (1=4)r2c3 - (4)r3c1 = (4)r3c6 ==> r3c6<>9 [edit: typos]

h-wing <=> hybrid-wing


Last edited by ronk on Sat Sep 04, 2010 11:42 pm; edited 1 time in total
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Mogulmeister



Joined: 03 May 2007
Posts: 703

PostPosted: Sat Sep 04, 2010 9:41 pm    Post subject: Reply with quote

Like many others, all happening around blocks 1&2 an ALS xz removing 8s (blue)

Set A {5,8,9} Green
Set B {1,2,8,9} Orange
x = 9
z = 8
(r1c46), r3c1 <> 8 Blue



Also viewed as a simple XY chain, pincers at r1c3 and r3c4
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Sun Sep 05, 2010 8:43 pm    Post subject: Reply with quote

X-Wing (1), not needed
Finned X-Wing (8)
AIC, r3c1, r5c6<>4
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