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Puzzle 10/08/31: B

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Tue Aug 31, 2010 4:10 am    Post subject: Puzzle 10/08/31: B Reply with quote
Code:
 +-----------------------+
 | 7 . 4 | . . 2 | . . 8 |
 | . 9 8 | 1 7 . | 4 . . |
 | 5 1 . | . . 8 | . . 2 |
 |-------+-------+-------|
 | . 6 . | 8 . . | 2 . . |
 | . 5 . | . . 9 | . . . |
 | 8 . 2 | . 4 5 | . . . |
 |-------+-------+-------|
 | . 2 . | 5 . . | 6 . . |
 | . . . | . . . | . 2 . |
 | 6 . 7 | . . . | . . 9 |
 +-----------------------+

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JC Van Hay



Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium
PostPosted: Tue Aug 31, 2010 12:11 pm    Post subject: Reply with quote
Quote:
XY Wing (69-3) : (36)R6C4 (69)R1C4 (93)R3C5 : => r45c5<>3
XY Wing (36-2) : (23)R9C4 (36)R6C4 (62)R5C5 : => r5c4,r9c5<>2
XY Wing Style : 1C8 3B9 (39)R6C7 : (1)r6c8=(9)r6c7: => r6c8<>9 ... or ... Type 1 UR : to avoid DP (13)R57C13 : r5c1=4
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
PostPosted: Tue Aug 31, 2010 1:30 pm    Post subject: Reply with quote
A fun snappy puzzle.........

Quote:
xy-wing -369 vertex (69)r1c4; r45c5<>3
xy-wing -236 vertex (36)r6c4; r5c4,r9c5<>2
Type 1 UR (13)r57c13; r5c1<>13=4

Ted
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Wed Sep 01, 2010 12:55 am    Post subject: Reply with quote
Very similar.

M-Wing (36) or XY-Wing (693) do the same thing. I saw the M-Wing first.
XY-Wing (362)
Type 1 UR (13) or can use the potential DP 35 in boxes 36, r4c89<>7 to prevent the DP on 13 used in the Type 1.
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