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Free Press July 26, 2012 Thursday

 
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keith



Joined: 19 Sep 2005
Posts: 3136
Location: near Detroit, Michigan, USA

PostPosted: Thu Jul 26, 2012 7:00 pm    Post subject: Free Press July 26, 2012 Thursday Reply with quote

Interesting, for P&P with no pencil marks.
Code:
Puzzle: FP072612Thu
+-------+-------+-------+
| . . 5 | . 8 . | 3 . . |
| . . . | . . 7 | . 1 8 |
| 8 . . | . 4 . | . . 7 |
+-------+-------+-------+
| . . 2 | . . . | 5 . 4 |
| 4 . . | 3 . 2 | . . 1 |
| 1 . 3 | . . . | . . . |
+-------+-------+-------+
| . . . | . 2 . | . . 6 |
| 9 4 . | 5 . . | . . . |
| . . 1 | . 3 . | 7 . . |
+-------+-------+-------+
Keith
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Marty R.



Joined: 12 Feb 2006
Posts: 5063
Location: Rochester, NY, USA

PostPosted: Thu Jul 26, 2012 8:55 pm    Post subject: Reply with quote

Too much for me. This is as far as I got sans PMs.

Code:

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

Play this puzzle online at the Daily Sudoku site
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keith



Joined: 19 Sep 2005
Posts: 3136
Location: near Detroit, Michigan, USA

PostPosted: Thu Jul 26, 2012 9:28 pm    Post subject: Reply with quote

Marty R. wrote:
Too much for me. This is as far as I got sans PMs.

Code:

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

Play this puzzle online at the Daily Sudoku site

Marty,
Where is the 9 in B5 solves 9 in R4C2 and R3C3.

Then, look at C6. Where is the 6 in B2 and then in B7?

Solving R5C3 as 6.

Masochistic, if you will. But, I'd far rather challenge myself to do this with pencil and paper (P&P) without pencil marks (PMs) than use software to help find more complicated patterns.

(And, by that, I mean to include software that simply does your pencil marks.)

Keith
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Marty R.



Joined: 12 Feb 2006
Posts: 5063
Location: Rochester, NY, USA

PostPosted: Thu Jul 26, 2012 11:08 pm    Post subject: Reply with quote

I try and do my newspaper's puzzles without PMs but don't always succeed. I lack the ability to visualize the grid in ways that would allow me to solve puzzles like this one.

For example, I see a 12345 in box 5 so it needs a 6789. I can't make any placements based on that so it's onto the next, row, column or box.

Quote:
(And, by that, I mean to include software that simply does your pencil marks.)


I see where you're coming from but don't know that I fully agree. I guess it depends on what one considers to be important Sudoku skills. Determining pencil marks is "grunt work", not part of the logic process needed to solve puzzles.

There's a parallel here to math in school when they let students use a calculator to do arithmetic as part of a more advanced course. The arithmetic is not really part of the skill set required to solve the advanced problems.
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Luke451



Joined: 20 Apr 2008
Posts: 310
Location: Southern Northern California

PostPosted: Thu Jul 26, 2012 11:32 pm    Post subject: Reply with quote

keith wrote:
(And, by that, I mean to include software that simply does your pencil marks.)

Keith, you're taking those six hour flights again, aren't you? Wink
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keith



Joined: 19 Sep 2005
Posts: 3136
Location: near Detroit, Michigan, USA

PostPosted: Fri Jul 27, 2012 12:36 am    Post subject: Reply with quote

Luke451 wrote:
keith wrote:
(And, by that, I mean to include software that simply does your pencil marks.)

Keith, you're taking those six hour flights again, aren't you? Wink

No, but I'm in training for Detroit to Cape Town via Amsterdam in August. Very Happy

For what it's worth, I find that working this hard on the basic skills is very rewarding. Kind of like working on your short game at golf.

Keith
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