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Sunday, July 24th

 
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OhioSaba



Joined: 21 Jul 2005
Posts: 8

PostPosted: Mon Jul 25, 2005 7:58 pm    Post subject: Sunday, July 24th Reply with quote

I was able to solve the problem, but it required taking a guess. Could someone explain the logical progression from the following point:

-/7/- 5/-/2 6/8/-
-/-/5 -/-/- -/1/2
6/8/2 -/4/1 5/3/-

2/3/7 -/5/- 9/4/1
8/-/- 2/7/9 3/6/5
9/5/6 4/1/3 2/7/8

-/2/- -/8/4 -/5/-
7/6/- 1/2/5 8/9/3
5/-/8 3/-/7 -/2/-

Thanks in advance.
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PostPosted: Mon Jul 25, 2005 9:50 pm    Post subject: Reply with quote

I am not sure if you mistakenly entered too much info but based on your entry, the next step is obviously the 4 to complete the eight row which then allows the completion of the 1's and 4's in the first 3 columns leading to an easily solution.
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renatus
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PostPosted: Mon Jul 25, 2005 10:06 pm    Post subject: Reply with quote

hint: the 4 can only be in block one and in the first row, thus ...
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renatus
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PostPosted: Mon Jul 25, 2005 10:09 pm    Post subject: Reply with quote

eh row=column Embarassed (it`s so confusing, I am refering to the vertical line of possibilities) Shocked
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OhioSaba



Joined: 21 Jul 2005
Posts: 8

PostPosted: Tue Jul 26, 2005 1:14 am    Post subject: Re: Sunday, July 24th Reply with quote

Embarassed

OhioSaba wrote:


-/7/- 5/-/2 6/8/-
-/-/5 -/-/- -/1/2
6/8/2 -/4/1 5/3/-

2/3/7 -/5/- 9/4/1
8/-/- 2/7/9 3/6/5
9/5/6 4/1/3 2/7/8

-/2/- -/8/4 -/5/-
7/6/- 1/2/5 8/9/-
5/-/8 3/-/7 -/2/-



The 3 in the 8th row was wrong. I read it from one of my "trial & error" worksheets.
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OhioSaba



Joined: 21 Jul 2005
Posts: 8

PostPosted: Tue Jul 26, 2005 1:33 am    Post subject: Reply with quote

renatus wrote:
eh row=column Embarassed (it`s so confusing, I am refering to the vertical line of possibilities) Shocked


This was the hint I needed, thank you very much.
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waspwatcher



Joined: 26 Jul 2005
Posts: 1

PostPosted: Tue Jul 26, 2005 9:59 am    Post subject: Sunday 24th July 2005 Reply with quote

I too got as far as OhioSaba and then got stuck but solved it by trial and error, can someone explain the logic from that point on .......

You say to put a 4 in row 8 column 9, I have a 3/4 possible for that square with another twin 3/4 in that horizontal line (column 3), I also have a 4/9 on the vertical (row 1) and another 2 possibilities for a 4 in that same bottom right square - 1/4 & 4/6

Thanks Confused
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Steve
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PostPosted: Tue Jul 26, 2005 4:06 pm    Post subject: 24th July puzzle Reply with quote

I also got to the position of Ohio and Waspwatcher and because a lot of the puzzle is complete can work out through trial and error. The Sudoku drawer shows the next move as a 9 in column 2, row 2. However I cannot complete the rationale for this move as it seems to me that there are options in columns 4 and 5 to complete that row and an option at the top of column 3 to complete that box.

Any advice would be gratefully received.
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OhioSaba



Joined: 21 Jul 2005
Posts: 8

PostPosted: Tue Jul 26, 2005 4:30 pm    Post subject: Reply with quote

In column 1 the number 4 can only be placed in row 1 or 2. What this means is that all other occurances of 4 in the upper left block can be eliminated; therefore, the 9 must be placed in 2,2.

Best regards
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steve
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PostPosted: Tue Jul 26, 2005 5:04 pm    Post subject: 24th July Reply with quote

Thanks OhioSaba - I must be having a bad day. I'll put it down and try later but they are so addictive.
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PostPosted: Wed Jul 27, 2005 8:29 am    Post subject: Reply with quote

Thanks for your explanation OhioSaba - Of course I see it all now !!!!!

Regards, Waspwatcher Very Happy Very Happy
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