clueless special 99

This forum is dedicated to the <a href="http://www.sudocue.net/clueless.php">Clueless Specials</a> published each Monday on the website.
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Oscar
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clueless special 99

Post by Oscar »

I found it very interesting, I could hardly make any progress on sudoku 6 (the one undrlying nonet 6 of the clueless). At the end, I finished it without going into that component at all!
Seems interesting to have only eight puzzles contributing to the solution of the clueless.
Is there any special name or designation for that kind of clueless?
Nothing can both be and not be
Pete
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Post by Pete »

welcome to the forum Oscar,


Im pretty sure you cant leave any one of the puzzles out and come to a solution .
:oops: *Danger* spoiler for active puzzle(1 point rather than 2)

blue puzzle without 6
*-----------------------------------------------------------------------------------------------*
| 123679 12579 236789 | 456 3456 345 | 123579 123789 1235789 |
| 12349 1249 23489 | 128 12 28 | 124567 12678 124578 |
| 124679 124579 246789 | 67 369 379 | 123479 123789 1234789 |
|-------------------------------+-------------------------------+-------------------------------|
| 3459 1358 23459 | 123456789 1234678 123456789 | 123456789 123456789 123456789 |
| 34579 1357 345679 | 1234568 123468 1234568 | 123456789 123456789 123456789 |
| 4579 578 245679 | 123456789 1234678 123456789 | 123456789 123456789 123456789 |
|-------------------------------+-------------------------------+-------------------------------|
| 236789 4679 234689 | 124789 16789 124679 | 1256789 45678 125789 |
| 123567 1567 12356 | 234 356 2456 | 156789 45678 15789 |
| 2356789 45679 2345689 | 1278 1678 1267 | 2356789 345678 235789 |
*-----------------------------------------------------------------------------------------------*

as far as i can get without 6

*-----------------------------------------------------------------------------*
| 1 2 7 | 46 456 45 | 39 389 89 |
| 9 4 3 | 18 12 28 | 56 67 57 |
| 6 5 8 | 7 9 3 | 14 12 24 |
|-------------------------+-------------------------+-------------------------|
| 45 1 29 | 2345689 234678 26789 | 345689 236789 24567 |
| 7 3 69 | 124568 12468 1268 | 145689 12689 2456 |
| 45 8 269 | 1234569 123467 12679 | 134569 123679 24567 |
|-------------------------+-------------------------+-------------------------|
| 3 6 4 | 89 78 79 | 2 5 1 |
| 2 7 1 | 34 35 45 | 689 68 89 |
| 8 9 5 | 12 16 126 | 7 4 3 |
*-----------------------------------------------------------------------------*
sudocue found one more digit, but a lot of its skills are still magic to me.


if you take and example from another site like sudoku.org.uk
the bar across the top has example samurais...
there are 4 grades check those out,
the center puzzle is solvable without any of the others in all but the daibolical.
the samurais here never have digits in the shared corners

somewhere in the clueless page there is an example clueless appatizer in the OhSoEasy difficulty level:
(here it is I couldnt find it)
1 2 3
..5.7.6.. ..1.2.3.. ..1.2.8..
.7.8.4.9. .2.4.6.8. .3.7.5.2.
1...5...2 8...5...7 6...1...4
.6.....3. .8.....6. .8.....1.
5.2...9.6 1.7...5.8 3.4...6.9
.3.....1. .9.....1. .6.....4.
6...9...7 5...6...1 8...3...5
.5.1.8.6. .4.5.8.7. .4.1.6.8.
..9.6.3.. ..8.7.9.. ..2.5.4..

4 5 6
..2.1.5.. ..3.8.5.. ..6.7.4..
.3.7.5.8. .2.6.5.7. .9.5.2.7.
1...6...3 7...3...8 7...4...2
.4.....3. .8.....6. .6.....4.
3.8...4.9 3.7...1.2 1.8...6.7
.2.....1. .5.....4. .4.....5.
2...8...5 5...6...7 6...9...5
.9.5.1.2. .1.5.2.3. .7.6.3.1.
..7.3.1.. ..9.4.6.. ..4.8.2..

7 8 9
..5.4.6.. ..3.2.8.. ..2.6.8..
.6.1.5.9. .2.6.1.7. .7.5.9.2.
8...2...5 6...4...1 1...8...5
.1.....5. .8.....1. .6.....3.
2.6...7.4 1.4...6.8 7.1...2.8
.5.....8. .6.....9. .8.....1.
5...9...1 8...5...9 4...3...1
.2.7.3.4. .4.2.6.3. .1.9.8.4.
..4.5.8.. ..6.9.4.. ..8.5.9..

005070600070804090100050002060000030502000906030000010600090007050108060009060300
001020300020406080800050007080000060107000508090000010500060001040508070008070900
001020800030705020600010004080000010304000609060000040800030005040106080002050400
002010500030705080100060003040000030308000409020000010200080005090501020007030100
003080500020605070700030008080000060307000102050000040500060007010502030009040600
006070400090502070700040002060000040108000607040000050600090005070603010004080200
005040600060105090800020005010000050206000704050000080500090001020703040004050800
003020800020601070600040001080000010104000608060000090800050009040206030006090400
002060800070509020100080005060000030701000208080000010400030001010908040008050900


Ruud is the inventor for the clueless so i guess ohsoeasy would be the designation

PS :
its on clueless special guide page... clueless helper cant find it.
i guess i havent visited that page for several years...
"It gets dark at night" - Olbers
Oscar
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Posts: 28
Joined: Wed Jan 16, 2008 10:31 am
Location: Montesson

clueless special 99

Post by Oscar »

Thank you for the informations Pete.
I found very interesting the link you supplied.
As for the clueless, without using the 6, I was not able to elimintate 5 from R1C4 :? . And since I have only the "blue" part of it, I can not go into more details.
Taking that elimination as true, I was able to advance e little more, but couldn't get a complete solution.
The puzzle now stand as this:
*-----------------------------------------------------------------------------*
| 1 2 7 | 46 456 45 | 39 389 89 |
| 9 4 3 | 18 12 28 | 56 67 57 |
| 6 5 8 | 7 9 3 | 4 1 2 |
|-------------------------+-------------------------+-------------------------|
| 45 1 2 | 345689 34678 6789 | 589 79 567 |
| 7 3 6 | 1458 1468 168 | 158 2 456 |
| 45 8 9 | 12459 1247 1279 | 1359 379 457 |
|-------------------------+-------------------------+-------------------------|
| 3 6 4 | 89 78 79 | 2 5 1 |
| 2 7 1 | 34 35 45 | 69 68 89 |
| 8 9 5 | 12 16 126 | 7 4 3 |
*-----------------------------------------------------------------------------*
Just finished the 100 using all resources, now I will try without one of the subyascent sudokus :wink: .
Nothing can both be and not be
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