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moshero3
Joined: 11 Feb 2012
Posts: 12
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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 Posted: Tue Feb 14, 2012 10:45 am Post subject: |
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Look closely at row 2.
There are basic moves left but this puzzle will require a very advanced move to complete. |
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Dart45
Joined: 16 Apr 2008
Posts: 17
Location: Canada
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| Posted: Tue Feb 14, 2012 12:42 pm Post subject: |
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Hmmm ... require a very advanced move to complete?
For some reason I was able to complete using basics only - and I double checked just to make sure I didn't make any mistakes!
Happy Valentines Day all! Dart |
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Dart45
Joined: 16 Apr 2008
Posts: 17
Location: Canada
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| Posted: Tue Feb 14, 2012 12:51 pm Post subject: |
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| Oooops ... Mia Culpa. I just realized that Arkietech and Moshero were not talking about today's puzzle. |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Tue Feb 14, 2012 1:01 pm Post subject: |
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Puzzle after basic moves:
| Code: | *-----------------------------------------------------------*
| 3 9 4 | 2 56 7 | 568 1 568 |
| 56 8 1 | 9 34 34 | 56 7 2 |
| 567 567 2 | 18 18 56 | 4 3 9 |
|-------------------+-------------------+-------------------|
| 2578 257 57 | 468 9 246 | 3 246 1 |
| 28 3 9 | 5 468 1 | 268 246 7 |
| 4 1 6 | 38 7 23 | 9 25 58 |
|-------------------+-------------------+-------------------|
| 9 2567 8 | 3467 3456 3456 | 1 256 356 |
| 1 4 35 | 36 2 8 | 7 9 356 |
| 2567 2567 357 | 1367 1356 9 | 256 8 4 |
*-----------------------------------------------------------*
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moshero3
Joined: 11 Feb 2012
Posts: 12
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| Posted: Tue Feb 14, 2012 5:36 pm Post subject: |
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dan hi,
saw your remark, it doesn't help solving |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Tue Feb 14, 2012 6:49 pm Post subject: |
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Found a long chain but don't like it. Looking at ur's in b258  |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Feb 14, 2012 7:13 pm Post subject: |
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| What is the source of this puzzle and its rating? |
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moshero3
Joined: 11 Feb 2012
Posts: 12
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| Posted: Tue Feb 14, 2012 7:45 pm Post subject: |
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| The puzzle is from book called "absolutely nasty sudoku - level 4" |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Feb 14, 2012 8:48 pm Post subject: |
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| moshero3 wrote: | | The puzzle is from book called "absolutely nasty sudoku - level 4" |
That's funny, I have that same book. I haven't done that many puzzles from it yet, but those I've seen don't live up to the book's title. Having said that, I don't see a solution to this one yet. |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Tue Feb 14, 2012 9:00 pm Post subject: |
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It is not pretty --- but works! | Code: | *-----------------------------------------------------------*
| 3 9 4 | 2 *56 7 |*568 1 *568 |
| 56 8 1 | 9 34 34 |f56 7 2 |
| 567 567 2 | 18 18 56 | 4 3 9 |
|-------------------+-------------------+-------------------|
| 2578 257 57 | 468 9 246 | 3 f246 1 |
| 28 3 9 | 5 *468 1 | 28-6 *246 7 |
| 4 1 6 | 38 7 23 | 9 25 58 |
|-------------------+-------------------+-------------------|
| 9 *2567 8 | 3467 *3456 3456 | 1 *256 356 |
| 1 4 35 | 36 2 8 | 7 9 356 |
|*2567 *2567 357 | 1367 *1356 9 | 256 8 4 |
*-----------------------------------------------------------*
finned franken jellyfish (6) |
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moshero3
Joined: 11 Feb 2012
Posts: 12
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| Posted: Tue Feb 14, 2012 9:52 pm Post subject: are you sure it is a jellyfish? |
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| As far as i know it should be a closed shape, c9r1 steps out. |
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JC Van Hay
Joined: 13 Jun 2010
Posts: 494
Location: Charleroi, Belgium
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| Posted: Tue Feb 14, 2012 10:25 pm Post subject: |
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| 3-SIS X Chain : 6r5c5=Kite(6C5R8)-6r1c9=6r12c7 => -6r5c7; NP(28)r5c17, 3 Singles, Pointing(5)R7; stte |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Wed Feb 15, 2012 12:19 am Post subject: |
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[Withdrawn: totally wrong on the viewpoint presented!!!]
Last edited by daj95376 on Wed Feb 15, 2012 5:40 am; edited 1 time in total |
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ronk
Joined: 07 May 2006
Posts: 398
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| Posted: Wed Feb 15, 2012 2:00 am Post subject: |
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| daj95376 wrote: | Unfortunately, it involves the "third" way Angus Johnson described using Colors ...
and that way never made it into his solver, Simple Sudoku. |
If that's true, then a bug has crept into my program. Actually, the chain you posted doesn't "fit" what I remember for his "third way" either. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Wed Feb 15, 2012 5:38 am Post subject: |
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| ronk wrote: | | daj95376 wrote: | Unfortunately, it involves the "third" way Angus Johnson described using Colors ...
and that way never made it into his solver, Simple Sudoku. |
If that's true, then a bug has crept into my program.
Actually, the chain you posted doesn't "fit" what I remember for his "third way" either. |
You are correct. I tripped up in several ways. Sorry!!! |
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moshero3
Joined: 11 Feb 2012
Posts: 12
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| Posted: Wed Feb 15, 2012 4:32 pm Post subject: |
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| does anyone has a simpler solution to this one? |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Wed Feb 15, 2012 4:59 pm Post subject: |
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| moshero3 wrote: | | does anyone has a simpler solution to this one? |
Like beauty, "simpler" is in the eye of the beholder. I used Medusa, simple coloring (possibly not needed) and an external analysis of the 34 UR. Definitely simpler for me, as I don't understand all the Franken stuff. |
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SudoQ
Joined: 02 Aug 2011
Posts: 127
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| Posted: Wed Feb 15, 2012 5:28 pm Post subject: |
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| moshero3 wrote: | | does anyone has a simpler solution to this one? |
| Code: | r1c5 or r3c6 = 6
r1c5=6 -> r2c7=6, r5c8=6, r4c8=4 -> r4c4<>4
r3c6=6 -> r7c6=5, r6c8=5, r6c6=2, r4c6=4 -> r4c4<>4 |
I don't know if this is a simple solution,
but I think it's easy to understand.
/SudoQ |
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Luke451
Joined: 20 Apr 2008
Posts: 310
Location: Southern Northern California
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| Posted: Wed Feb 15, 2012 7:06 pm Post subject: |
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| SudoQ wrote: | | moshero3 wrote: | | does anyone has a simpler solution to this one? |
| Code: | r1c5 or r3c6 = 6
r1c5=6 -> r2c7=6, r5c8=6, r4c8=4 -> r4c4<>4
r3c6=6 -> r7c6=5, r6c8=5, r6c6=2, r4c6=4 -> r4c4<>4 |
I don't know if this is a simple solution,
but I think it's easy to understand.
/SudoQ |
Not so easy for me, SudoQ. I can't get either chain to work starting from the position after basics.
| Code: | *-----------------------------------------------------------*
| 3 9 4 | 2 56 7 | 568 1 568 |
| 56 8 1 | 9 34 34 | 56 7 2 |
| 567 567 2 | 18 18 56 | 4 3 9 |
|-------------------+-------------------+-------------------|
| 2578 257 57 | 468 9 246 | 3 246 1 |
| 28 3 9 | 5 468 1 | 268 246 7 |
| 4 1 6 | 38 7 23 | 9 25 58 |
|-------------------+-------------------+-------------------|
| 9 2567 8 | 3467 3456 3456 | 1 256 356 |
| 1 4 35 | 36 2 8 | 7 9 356 |
| 2567 2567 357 | 1367 1356 9 | 256 8 4 |
*-----------------------------------------------------------*
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