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swando
Joined: 09 Mar 2009
Posts: 17
Location: Surrey, BC. Canada
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 Posted: Thu Apr 02, 2009 1:44 am Post subject: April 1 Hard |
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Maybe I'm blind today or did it wrong but have tried 2x... The hint is 9 in C2 R7. Can some tell me what I missed?
| 38 38 7 | 9 56 56 | 1 2 4 |
| 6 5 1 | 8 4 2 | 9 7 3 |
| 9 4 2 | 1 3 7 | 5 6 8 |
+-------------+----------------+-----------+
| 7 6 8 | 24 12 9 | 3 14 5 |
| 2 19 59 | 3 1578 458 | 78 149 6 |
| 135 139 4 | 6 1578 58 | 78 19 2 |
+-------------+----------------+-----------+
| 45 29 3 | 2457 2567 1 | 26 8 79 |
| 18 128 6 | 27 9 3 | 4 5 17 |
| 1458 7 59 | 245 2568 4568 | 26 3 19 | |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Thu Apr 02, 2009 4:07 am Post subject: Re: April 1 Hard |
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| swando wrote: | Maybe I'm blind today or did it wrong but have tried 2x... The hint is 9 in C2 R7. Can some tell me what I missed?
| Code: | | 38 38 7 | 9 56 56 | 1 2 4 |
| 6 5 1 | 8 4 2 | 9 7 3 |
| 9 4 2 | 1 3 7 | 5 6 8 |
+-------------+----------------+-----------+
| 7 6 8 | 24 12 9 | 3 14 5 |
| 2 19 59 | 3 1578 458 | 78 149 6 |
| 135 139 4 | 6 1578 58 | 78 19 2 |
+-------------+----------------+-----------+
| 45 29 3 | 2457 2567 1 | 26 8 79 |
| 18 128 6 | 27 9 3 | 4 5 17 |
| 1458 7 59 | 245 2568 4568 | 26 3 19 | |
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You have in column 4 the 5 and 7 needing to be in box 8. Once you remove the other 5s and 7s from that box you may see the answer. |
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Zoelly
Joined: 15 Mar 2009
Posts: 8
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| Posted: Mon Apr 06, 2009 3:37 am Post subject: April 1, Hard |
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Hi Swando,
I was in similar "blind" mode on this one for days.
This evening I finally saw the numbers that broke the log jam.
Did you get it solved? If not, I'll give a hint.
Zoelly |
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David C
Joined: 21 Apr 2009
Posts: 2
Location: Virginia, USA
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| Posted: Tue Apr 21, 2009 5:30 am Post subject: April 1 Hard |
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Hello Zoelly,
Some of us are still in a "blind mode" on this one. May we have your hint, please?
David C[/quote][/b] |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Tue Apr 21, 2009 6:43 pm Post subject: |
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| Code: | .------------------.------------------.------------------.
| 38 38 7 | 9 56 56 | 1 2 4 |
| 6 5 1 | 8 4 2 | 9 7 3 |
| 9 4 2 | 1 3 7 | 5 6 8 |
:------------------+------------------+------------------:
| 7 6 8 | 24 12 9 | 3 14 5 |
| 2 19 59 | 3 1578 458 | 78 149 6 |
| 135 139 4 | 6 1578 58 | 78 19 2 |
:------------------+------------------+------------------:
| 45 29 3 | 2457 2567 1 | 26 8 79 |
| 18 128 6 | 27 9 3 | 4 5 17 |
| 1458 7 59 | 245 2568 4568 | 26 3 19 |
'------------------'------------------'------------------' |
everything happens with respect to box 8
first notice the 7's in column 5... they can only be in box 5 in col 5, so you can remove the 7 at r7c5 (pointing pair)
then notice the 8's in row 9... they can only exist in box 8 in row 9, so this removes the 8 in r9c1. (pointing pair)
the tricky one to see is the 5's like Marty mentioned... there are only two 5's in column 4 and they happen to exist in box 8. so this eliminates the 5's in r79c5 and r9c6. (box/line interaction)
after all that dust settles, with the 5 and 7 gone from r7c5, the {2,6} naked pair remains in row 7.
that naked pair should end the blindness. |
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David C
Joined: 21 Apr 2009
Posts: 2
Location: Virginia, USA
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| Posted: Tue Apr 21, 2009 9:43 pm Post subject: April 1 Hard |
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Thank you, Norm. I got it!!
It was one of those cases where it was right there in front of me but I didn’t see it until you pointed it out, patiently, and in very clear steps. I appreciate your assistance.
David C. |
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