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Puzzle 11/08/24: ~ XY

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Wed Aug 24, 2011 5:13 pm    Post subject: Puzzle 11/08/24: ~ XY Reply with quote
Code:
 +-----------------------+
 | . . . | . 2 . | . . . |
 | . 7 . | . . . | . 5 . |
 | . . . | . . 6 | 3 . 2 |
 |-------+-------+-------|
 | . . . | 3 . 4 | . 2 8 |
 | 7 . . | . 9 5 | 6 . 3 |
 | . . 3 | 1 6 . | . . . |
 |-------+-------+-------|
 | . . 7 | . 4 . | . 3 . |
 | . 4 . | 2 . . | 5 1 . |
 | . . 2 | 6 5 . | . . 4 |
 +-----------------------+

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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Thu Aug 25, 2011 4:58 am    Post subject: Reply with quote
External analysis of 13 DP boxes 17; r2c5<>3
Four-cell XY-Chain; 9 in r8c9 proves 7 in r1c4; r1c9<>7
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