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Free Press Sep 3, 2010

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keith

Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

Posted: Fri Sep 03, 2010 4:59 pm Post subject: Free Press Sep 3, 2010

Code:

Puzzle: FP090310
+-------+-------+-------+
| . 9 . | 1 . 2 | . 3 . |
| . 5 7 | . . . | . . . |
| . . . | . . . | 5 . . |
+-------+-------+-------+
| . . 5 | . . 7 | 8 1 . |
| 3 . . | . . . | . . 9 |
| . 4 1 | . . . | 3 . . |
+-------+-------+-------+
| . . 4 | . . . | . . . |
| . . . | . 8 1 | 9 2 . |
| . 2 . | 6 . 3 | . 7 . |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site

Marty R.

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

Posted: Fri Sep 03, 2010 9:12 pm Post subject:

After considerable time I'm finding this a major struggle.

keith

Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

Posted: Fri Sep 03, 2010 9:20 pm Post subject:

Marty R. wrote:

After considerable time I'm finding this a major struggle.

That's why they call it Labor Day? Wink

Keith

Marty R.

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

Posted: Fri Sep 03, 2010 10:10 pm Post subject:

I finally slogged my way through it.

Quote:

4-cell XY-Chain; r3c2, r5c3<>8
XY-Wing (587)
W-Wing (58)
UR 29; r7c45<>7 due to invalidity

peterj

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

Posted: Sat Sep 04, 2010 12:19 am Post subject:

Indeed challenging! Three wings...

Quote:

xy-wing pivoted on an ANP (7=5)r8c4 - (5=28)r5c34 - (8=7)r5c2 ; r8c2<>7
w-wing(58) (5=8)r5c4 - r5c2=r7c2 - (8=5)r7c8 ; r5c8<>5, r7c4<>5
m-wing(56) (5=6)r6c8 - r5c8=(6-5)r5c6=r7c6 ; r7c8<>5

daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Sat Sep 04, 2010 4:03 am Post subject:

Peter, an interesting first step. An alternate perspective:

Code:

(7=82=5)r5c234 - (5=7)r8c4 => r8c2<>7
+-----------------------------------------------------------------------+
| 468 9 68 | 1 5 2 | 47 3 678 |
| 1468 5 7 | 3 69 4689 | 2 4689 168 |
| 12468 138 2368 | 789 679 4689 | 5 4689 168 |
|-----------------------+-----------------------+-----------------------|
| 9 6 5 | 4 3 7 | 8 1 2 |
| 3 78 28 | 258 1 568 | 47 456 9 |
| 278 4 1 | 2589 269 5689 | 3 56 567 |
|-----------------------+-----------------------+-----------------------|
| 1578 178 4 | 2579 279 59 | 6 58 3 |
| 567 37 36 | 57 8 1 | 9 2 4 |
| 58 2 9 | 6 4 3 | 1 7 58 |
+-----------------------------------------------------------------------+
# 80 eliminations remain

Mogulmeister

Joined: 03 May 2007
Posts: 1151

Posted: Tue Sep 07, 2010 3:57 am Post subject:

Nice ALS xz Danny.

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