The Times - Fiendish No.148

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The Times - Fiendish No.148

Postby tabber » Tue May 31, 2005 1:45 pm

Hi,

After 5 days of tube journeys, I gave up on No.148, and eventually solved it by photocopying what I had done, and taking two possible routes to find which one was correct. However, that just goes against every fibre in my being.... I want it to be logical!

Can someone please tell me how you would solve this using logic.

**8 2** 4**
*94 *71 35*
*1* *4* **6

4*1 **7 *23
*2* *3* ***
*8* 12* **4

549 *1* 68*
176 *8* *3*
832 **5 14*

I went through every row, column and 9x9 box about 50 times, and wrote down every single pencil mark, which was a mess. But still couldn't solve it.

I only started fairly recently, but am already hooked (seems a recurring theme), so looking for some tips on this one, as its the first one i've been stuck on. Nice one Wayne - you got me ;-)

Cheers,

Kevin.
tabber
 
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Joined: 31 May 2005

No. 148

Postby Not Carol V » Tue May 31, 2005 2:03 pm

You are by no means alone! The best thing you can do is look at the earlier thread on this puzzle, here in the Times forum. Good luck.
Not Carol V
 
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Joined: 20 May 2005

Postby tabber » Tue May 31, 2005 2:10 pm

Ah, apologies. Didn't realise I had duped an earlier post, will check that out. I've got No.157 for the train home, so lets see how that goes:)
tabber
 
Posts: 25
Joined: 31 May 2005

Postby tabber » Tue May 31, 2005 2:24 pm

Ok, thanks to Animator for the other thread (and my profound apologies for not checking that first, damn newbies....).

I now have a warm glow, knowing how it should be solved.

I had almost all the pieces in place, but didn't realise you could do the "Only two numbers in two cells" trick with rows and columns as well. Seems so obvious now, especially as I had already pulled this trick in box 3, for the 2 and 8. The bit I missed was the fact that Row 6 had a 6/9 pairing in two cells. I won't miss that one again. I guess they're not called fiendish for nothing.

Happy su-doku-ing everyone.

Kevin.
tabber
 
Posts: 25
Joined: 31 May 2005

Postby Not Carol V » Tue May 31, 2005 2:30 pm

Glad you're sorted. You must be a lot cleverer than me, though. I have to admit it took me another few days even after reading the tips.
Not Carol V
 
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Joined: 20 May 2005

Postby Animator » Tue May 31, 2005 4:24 pm

The other topics that discuss this puzzles are:

http://forum.enjoysudoku.com/viewtopic.php?t=240 ==> this one starts from the same grid as the one in this topic;


http://forum.enjoysudoku.com/viewtopic.php?t=254 ==> this is another one, which hasn't reached the grid posted here (yet)

(Wayne, can you close/lock this thread?)
Animator
 
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