The New Sudoku Players' Forum

by **dukuso** » Mon Jul 05, 2010 8:43 pm

just a spontaneous idea, I don't know whether it makes
reasonable puzzles

http://en.wikipedia.org/wiki/Set_(game)

81.

make a sudoku-like puzzle from it

put the missing cards into a sudoku-array such that each minirow,minicolumn,
maxirow,maxicolumn form a SET

by **dukuso** » Tue Jul 06, 2010 2:09 pm

ahh, wikipedia even mentions it:
but it looks just like normal sudoku, only with cards
except of pencils.

-------------------
Set-Do-Ku: the 81 cards of the Set deck can be grouped by any 2 properties (e.g. color and shading), giving 9 groups of 9 cards. Cards are then placed within a 9 x 9 grid to match a standard Sudoku puzzle by mapping a specific Sudoku digit to a specific card group (e.g. Sudoku digit 1 maps to any open-red card, Sudoku digit 2 maps to any striped-red card, Sudoku digit 3 maps to any solid-red card, etc.). After this initial setup the puzzle is solved using the remaining cards.

by **dukuso** » Tue Jul 06, 2010 5:27 pm

a setokugrid is a bijective map s=(s_1,s_2,s_3,s_4):I3^4-->I3^4 such that
s_i(-,b,c,d)=s_i(a,-,c,d)=s_i(a,b,-,d)=s_(a,b,c,-)=I3
for all a,b,c,d in I3 , i in I4 ^.

write the 4 digits s(a,b,c,d) in a cell of a 9*9-grid at position (a*3-3+b,c*3-3+d)

or arrange the SET-cards in a 9*9-array, such that the 3 positions in
the 6 sets 123,456,789,147,258,369 in each row and each column contain
all the 3 expressions of all the 4 properties.

there are 75168 setokugrids from 29 symmetry-classes

make a puzzle by removing cards ...

but presumably these don't give so nice puzzles for handsolvers
since you have to check lots of the remaining cards
at each move

this is again an exact cover problem, so the exact-cover-computer-solvers
can be easily adapted

maybe I can create some puzzles later

1st of the 75168 solution grids:

Code: Select all: 2 +--------+--------+--------+ |11 22 33|22 33 11|33 11 22| |11 22 33|23 31 12|32 13 21| | | | | |22 33 11|33 11 22|11 22 33| |32 13 21|11 22 33|23 31 12| | | | | |33 11 22|11 22 33|22 33 11| |23 31 12|32 13 21|11 22 33| +--------+--------+--------+ |23 31 12|31 12 23|12 23 31| |22 33 11|31 12 23|13 21 32| | | | | |31 12 23|12 23 31|23 31 12| |13 21 32|22 33 11|31 12 23| | | | | |12 23 31|23 31 12|31 12 23| |31 12 23|13 21 32|22 33 11| +--------+--------+--------+ |32 13 21|13 21 32|21 32 13| |33 11 22|12 23 31|21 32 13| | | | | |13 21 32|21 32 13|32 13 21| |21 32 13|33 11 22|12 23 31| | | | | |21 32 13|32 13 21|13 21 32| |12 23 31|21 32 13|33 11 22| +--------+--------+--------+

I think the exact cover matrix has 6561 rows and 1458 columns, much
bigger than normal sudoku with 729 rows and 324 columns.

each placement of one of the 81 "cards" into one of the 81 positions is a row.
one 1 goes into 81 cells so each cell gets exactly one symbol
one 1 goes into 81 symbols=cards so each card is use exactly once
one 1 goes into one of 3 columns for each of 27 minirows for each of 4 3ary digits ("properties")
minicolumns
distance3subrow
ditance3subcolumn

by **simon_blow_snow** » Sat Jan 01, 2011 5:58 am

I have created 2 puzzles using exactly the same concept here, plus some simple extra rules.

In this puzzle, each symbol has 4 attributes:

square structure: 1-sq/2-sq/3x3-sq
X structure: no-X/small-X/large-X
outline colour: black/blue/red
shading colour: white/yellow/green

Combining the 2 shape structures defines one sudoku grid, while combining the 2 colours defines another.

The extra rule is: neighbours have different attributes.

This is the solution: Show

The solution contains 81 different symbols, exactly the 81 pieces for the set game.

On each row, column, nonet (i.e. 3x3 blocks), spot (e.g. R147C147), diagonal etc, each particular attribute (e.g. green shading) appears exactly 3 times.

I love this solution image so much, I use it as my avatar. :lol:

by **simon_blow_snow** » Sat Jan 01, 2011 6:11 am

This is another puzzle:

Similar to the previous one, but this time we have 2 extra rules:

Neighbours share an attribute in shape.
Neighbours have different colour attributes.

This is the solution: Show

With this solution grid, there is this nice property: each of the 6 pairing of attributes defines a Sudoku grid (e.g. you can combine outline colour with X-structure to define a valid Sudoku grid. So 6 different Sudoku grids appear here.

Wthin each row, column, nonet, block, diagonal etc, if you pick out 3 cells with a particular attribute, say black outline, all 3 other attributes (square, X, shading) are different in those 3 cells.

I guess this makes the perfect setoku/setdoku grid.

by **tarek** » Sat Jan 01, 2011 3:15 pm

This variant has the potential of giving many enjoyable puzzles for solvers & programmers. Simon, Thanks for the visuals ... Are these copyrighted ?

As dukuso mentioned the basics of how to start.

Apart from the visuals that Simon provided for the symbols, we can use the ((1,2,3),(1,2,3),(1,2,3),(1,2,3)) array for each symbol. to make it more portable we can use a ((1,2,3),(4,5,6),(7,8,9),(A,B,C)) array & therfore represnt a symbol with 4 different characters (e.g. 147A) to allow a single line of 4*81 characyers to display the puzzle in linear format. This will allow better database storage.

Here is the reresentation of dukuso's earlier solution grid (The line is obviously is too long)

Code: Select all: 147A258B369C258C369A147B369B147C258A259B367C148A367A148B259C148C259A367B368C149A257B149B257C368A257A368B149C268B349C157A349A157B268C157C268A349B347C158A269B158B269C347A269A347B158C159A267B348C267C348A159B348B159C267A359C167A248B167B248C359A248A359B167C168A249B357C249C357A168B357B168C249A247B358C169A358A169B247C169C247A358B 147A 258B 369C 258C 369A 147B 369B 147C 258A 259B 367C 148A 367A 148B 259C 148C 259A 367B 368C 149A 257B 149B 257C 368A 257A 368B 149C 268B 349C 157A 349A 157B 268C 157C 268A 349B 347C 158A 269B 158B 269C 347A 269A 347B 158C 159A 267B 348C 267C 348A 159B 348B 159C 267A 359C 167A 248B 167B 248C 359A 248A 359B 167C 168A 249B 357C 249C 357A 168B 357B 168C 249A 247B 358C 169A 358A 169B 247C 169C 247A 358B

Most databases would allow a maximum of 255 characters for a field entry, you may want to divide the line into 2 parts & then assign the key to both fields.

As Simon did. You can you either treat it as a vanilla sudoku or add some constraints: (Disjoint groups, X, Fairy chess)

if you want to stick with numbers, there is a potential killer in the making.

Solving Techniques (that I can think of):
Naked triples
Hidden subsets
Swordfish

Definitely a nice project.

Anyone wants to have a go at the Most Canonical grid (MC grid) of Setoku :lol:

?

tarek

by **simon_blow_snow** » Sun Jan 02, 2011 5:04 am

tarek wrote:Simon, Thanks for the visuals ... Are these copyrighted ?

I did spend considerable time and thoughts developing the whole system and making the images, so it would be nice if anyone who want to use the idea would cite the source.

by **tarek** » Sun Jan 02, 2011 11:50 am

simon_blow_snow wrote:
tarek wrote:Simon, Thanks for the visuals ... Are these copyrighted ?

I did spend considerable time and thoughts developing the whole system and making the images, so it would be nice if anyone who want to use the idea would cite the source.

~That shouldn't be a problem from my side.

For future reference would you want to correlate the symbol attributes to the [(1,2,3),(4,5,6),(7,8.9),(A,B,C)] format. If the process is automated, could you post your graphic equivalent of dukuso's solution grid ?

Code: Select all: 147A 258B 369C 258C 369A 147B 369B 147C 258A 259B 367C 148A 367A 148B 259C 148C 259A 367B 368C 149A 257B 149B 257C 368A 257A 368B 149C 268B 349C 157A 349A 157B 268C 157C 268A 349B 347C 158A 269B 158B 269C 347A 269A 347B 158C 159A 267B 348C 267C 348A 159B 348B 159C 267A 359C 167A 248B 167B 248C 359A 248A 359B 167C 168A 249B 357C 249C 357A 168B 357B 168C 249A 247B 358C 169A 358A 169B 247C 169C 247A 358B

If It isn't automated then don't worry about it.

The solution grid would need 4*81 characters.
The empty cell could have 0 or .
A puzzle with no more than 58 clues can be threfore representd with no more than 255 characters.

tarek

Thanks,

tarek

by **simon_blow_snow** » Sun Jan 02, 2011 2:29 pm

tarek

The images are all hand-made using spreadsheet. I am afraid I don't have time to make one from a particular puzzle unless it's very very special.

If you want to get your hands on it yourself then feel free to do it.

As for the text format, I suggest you use a digit from {123456789} to represent 2 attributes, and then a letter from {ABCDEFGHK} to represent another 2. This way the size is much smaller.

Or, one can pick out 19 symbols to combine with the 10 digits and 52 letters so each of the 81 values can be represented by a single character. A possible list is:

Code: Select all: `~!@#$%^&*-_+\|/?;:

It might look confusing but I like doing things concisely.

by **tarek** » Sun Jan 02, 2011 5:33 pm

The following is 82 character set which I'm going to use for Storage & text representation. The "." character will represent an empty cell. They are all sorted Alphanumerically as per Microsoft Access.

Code: Select all: .[]{}~Â¢Â£Â¥Â¬Âµ123456789AÃÃ€Ã‚Ã„ÃƒÃ…Ã†BCÃ‡DÃEÃ‰ÃˆÃŠÃ‹FÆ’GHIÃÃŒÃŽÃJKLMNÃ‘OÃ“Ã’Ã”Ã–Ã•Ã˜Å’PQRSÅ ÃŸTÃžUÃšÃ™Ã›ÃœVWXYÃÅ¸ZÅ½

For the text to image conversion, I will use the following:

simon_blow_snow wrote:In this puzzle, each symbol has 4 attributes:
square structure: 1-sq/2-sq/3x3-sq
X structure: no-X/small-X/large-X
outline colour: black/blue/red
shading colour: white/yellow/green

Code: Select all: Attribute 1: Square, 1-sq =1 , 2-sq=2 , 3x3 sq =3 Attribute 2: X, no-X =1 , small-X=2 , large-X =3 Attribute 3: outline , black =1 , blue=2 , red =3 Attribute 4: shade , white =1 , yellow=2 , green =3

And here is the conversion table

Code: Select all: Attr Graphic Symbol S 12 13 14 23 24 34 ------------------------------------------------------------------ 0 None None None None . . . . . . . 1111 1 Sq No X Black Out White In 1 1 1 1 1 1 1 1112 1 Sq No X Black Out Yellow In 2 1 1 2 1 2 2 1113 1 Sq No X Black Out Green In 3 1 1 3 1 3 3 1121 1 Sq No X Blue Out White In 4 1 2 1 2 1 4 1122 1 Sq No X Blue Out Yellow In 5 1 2 2 2 2 5 1123 1 Sq No X Blue Out Green In 6 1 2 3 2 3 6 1131 1 Sq No X Red Out White In 7 1 3 1 3 1 7 1132 1 Sq No X Red Out Yellow In 8 1 3 2 3 2 8 1133 1 Sq No X Red Out Green In 9 1 3 3 3 3 9 1211 1 Sq Small X Black Out White In A 2 1 1 4 4 1 1212 1 Sq Small X Black Out Yellow In B 2 1 2 4 5 2 1213 1 Sq Small X Black Out Green In C 2 1 3 4 6 3 1221 1 Sq Small X Blue Out White In D 2 2 1 5 4 4 1222 1 Sq Small X Blue Out Yellow In E 2 2 2 5 5 5 1223 1 Sq Small X Blue Out Green In F 2 2 3 5 6 6 1231 1 Sq Small X Red Out White In G 2 3 1 6 4 7 1232 1 Sq Small X Red Out Yellow In H 2 3 2 6 5 8 1233 1 Sq Small X Red Out Green In I 2 3 3 6 6 9 1311 1 Sq Big X Black Out White In J 3 1 1 7 7 1 1312 1 Sq Big X Black Out Yellow In K 3 1 2 7 8 2 1313 1 Sq Big X Black Out Green In L 3 1 3 7 9 3 1321 1 Sq Big X Blue Out White In M 3 2 1 8 7 4 1322 1 Sq Big X Blue Out Yellow In N 3 2 2 8 8 5 1323 1 Sq Big X Blue Out Green In O 3 2 3 8 9 6 1331 1 Sq Big X Red Out White In P 3 3 1 9 7 7 1332 1 Sq Big X Red Out Yellow In Q 3 3 2 9 8 8 1333 1 Sq Big X Red Out Green In R 3 3 3 9 9 9 2111 2 Sq No X Black Out White In S 4 4 4 1 1 1 2112 2 Sq No X Black Out Yellow In T 4 4 5 1 2 2 2113 2 Sq No X Black Out Green In U 4 4 6 1 3 3 2121 2 Sq No X Blue Out White In V 4 5 4 2 1 4 2122 2 Sq No X Blue Out Yellow In W 4 5 5 2 2 5 2123 2 Sq No X Blue Out Green In X 4 5 6 2 3 6 2131 2 Sq No X Red Out White In Y 4 6 4 3 1 7 2132 2 Sq No X Red Out Yellow In Z 4 6 5 3 2 8 2133 2 Sq No X Red Out Green In [ 4 6 6 3 3 9 2211 2 Sq Small X Black Out White In ] 5 4 4 4 4 1 2212 2 Sq Small X Black Out Yellow In { 5 4 5 4 5 2 2213 2 Sq Small X Black Out Green In } 5 4 6 4 6 3 2221 2 Sq Small X Blue Out White In ~ 5 5 4 5 4 4 2222 2 Sq Small X Blue Out Yellow In Â¢ 5 5 5 5 5 5 2223 2 Sq Small X Blue Out Green In Â£ 5 5 6 5 6 6 2231 2 Sq Small X Red Out White In Â¥ 5 6 4 6 4 7 2232 2 Sq Small X Red Out Yellow In Â¬ 5 6 5 6 5 8 2233 2 Sq Small X Red Out Green In Âµ 5 6 6 6 6 9 2311 2 Sq Big X Black Out White In Ã€ 6 4 4 7 7 1 2312 2 Sq Big X Black Out Yellow In Ã 6 4 5 7 8 2 2313 2 Sq Big X Black Out Green In Ã‚ 6 4 6 7 9 3 2321 2 Sq Big X Blue Out White In Ãƒ 6 5 4 8 7 4 2322 2 Sq Big X Blue Out Yellow In Ã„ 6 5 5 8 8 5 2323 2 Sq Big X Blue Out Green In Ã… 6 5 6 8 9 6 2331 2 Sq Big X Red Out White In Ã† 6 6 4 9 7 7 2332 2 Sq Big X Red Out Yellow In Ã‡ 6 6 5 9 8 8 2333 2 Sq Big X Red Out Green In Ãˆ 6 6 6 9 9 9 3111 3x3 Sq No X Black Out White In Ã‰ 7 7 7 1 1 1 3112 3x3 Sq No X Black Out Yellow In ÃŠ 7 7 8 1 2 2 3113 3x3 Sq No X Black Out Green In Ã‹ 7 7 9 1 3 3 3121 3x3 Sq No X Blue Out White In ÃŒ 7 8 7 2 1 4 3122 3x3 Sq No X Blue Out Yellow In Ã 7 8 8 2 2 5 3123 3x3 Sq No X Blue Out Green In ÃŽ 7 8 9 2 3 6 3131 3x3 Sq No X Red Out White In Ã 7 9 7 3 1 7 3132 3x3 Sq No X Red Out Yellow In Ã 7 9 8 3 2 8 3133 3x3 Sq No X Red Out Green In Ã‘ 7 9 9 3 3 9 3211 3x3 Sq Small X Black Out White In Ã’ 8 7 7 4 4 1 3212 3x3 Sq Small X Black Out Yellow In Ã“ 8 7 8 4 5 2 3213 3x3 Sq Small X Black Out Green In Ã” 8 7 9 4 6 3 3221 3x3 Sq Small X Blue Out White In Ã• 8 8 7 5 4 4 3222 3x3 Sq Small X Blue Out Yellow In Ã– 8 8 8 5 5 5 3223 3x3 Sq Small X Blue Out Green In Ã˜ 8 8 9 5 6 6 3231 3x3 Sq Small X Red Out White In Ã™ 8 9 7 6 4 7 3232 3x3 Sq Small X Red Out Yellow In Ãš 8 9 8 6 5 8 3233 3x3 Sq Small X Red Out Green In Ã› 8 9 9 6 6 9 3311 3x3 Sq Big X Black Out White In Ãœ 9 7 7 7 7 1 3312 3x3 Sq Big X Black Out Yellow In Ã 9 7 8 7 8 2 3313 3x3 Sq Big X Black Out Green In Ãž 9 7 9 7 9 3 3321 3x3 Sq Big X Blue Out White In ÃŸ 9 8 7 8 7 4 3322 3x3 Sq Big X Blue Out Yellow In Å’ 9 8 8 8 8 5 3323 3x3 Sq Big X Blue Out Green In Å 9 8 9 8 9 6 3331 3x3 Sq Big X Red Out White In Å¸ 9 9 7 9 7 7 3332 3x3 Sq Big X Red Out Yellow In Å½ 9 9 8 9 8 8 3333 3x3 Sq Big X Red Out Green In Æ’ 9 9 9 9 9 9

I hope that this is helpful for everybody aiming to solve/generate/program these. Thanks to dukuso & to simon_blow_snow .

tarek

[EDIT: Revised Line character symbols to remove special MS-DOS chracters, also added Sudoku Grid repesentation to the conversion table]

by **simon_blow_snow** » Mon Jan 03, 2011 10:21 am

tarek

Nice scheme. The only problem I have is the ability to input those accented chars easily using notepad etc.

I am currently working on another graphical scheme which makes the symbols more distinguishable.

Simon B. Snow

by **tarek** » Mon Jan 03, 2011 11:34 pm

I tried several schemes. The one that I mentioned ticks most boxes (Not all !).

Here is my 1st attempt at a setoku

Code: Select all: Each MiniRow/MiniColumn forms a set Each Attribute appears 3 times in each Row/Column/Box .... .... .... .... 3331 1112 3332 .... .... .... .... 1121 .... .... .... .... .... .... 3323 .... 2212 1132 .... .... 2211 3322 .... 2322 .... .... 3131 .... .... 1213 .... .... 3113 .... .... 1222 2333 .... .... .... 1223 .... .... 3123 .... 3121 .... .... .... 2311 .... 1311 2122 .... .... 3231 2121 .... 1313 .... .... .... .... .... .... 3212 .... .... .... .... 1331 3221 1332 .... .... .... ....

The puzzle is human solvable but slightly beyond the obvious (I think).
The solution is dukuso's solution grid that appeared earlier.

tarek
[Edit: Removed old line characters]

by **tarek** » Tue Jan 04, 2011 3:10 pm

The Setdoku above can be solved without knowing the pairing that form a sudoku grid. It also can't be solved by directly deducing the symbol from the already known 2 other symbols of the set.

If you knew the pairing that form the sudoku then advancing the puzzle becomes easier, but as I said the puzzle is still humanly solvable without that knowledge.

Symbol related techniques beyond the obvious include the Attribute's naked triple, hidden triple, locked triple & swordfish).

The Symbol pencilmark grid shows all possible unknown attributes per cell (so up to 12). When you get all 4 attributes in a cell then you uncover the symbol in there. if you uncover 27 symbols sharing one attribute (all symbols that have that attribute) then that attribute can be safely eliminated from all other cells.

If a cell has only one possible symbol left using some or all the techniques mentiond. Then uncovering the symbol is similar to a (Naked single).

Here is another puzzle with the same solution. You don't need to know which pair of attributes form a sudoku subgrid (although you can deduce it). It is human solvable with Symbol based techniques.

Code: Select all: Tarek's Setdoku Puzzle 02 Each MiniRow/MiniColumn forms a set Each Attribute appears 3 times in each Row/Column/Box .... .... 3333 2223 3331 .... .... .... .... .... .... 1121 .... .... .... 1123 .... .... .... 1131 .... 1132 .... .... .... 3322 1133 .... .... .... 3131 .... 2323 1213 .... 3132 3113 .... .... .... .... .... .... .... 1223 1231 .... 3123 2313 .... 1232 .... .... .... 3233 1311 .... .... .... 3231 .... 3232 .... .... .... 3213 .... .... .... 3212 .... .... .... .... .... .... 1332 2113 1333 .... ....

I will provide a walkthrough, but for that I need to use the 147A method to represent the symbol instead of the 1111 method above.

tarek
[EDIT: Removed old line characters]

by **tarek** » Thu Jan 13, 2011 4:05 pm

These generated grids should be canonical:

Code: Select all: Setdoku grid 01 81 different symbols in 81 different squares 6 different attribute combinations form a sudoku grid 123123123123 format: 1111 1222 1333 2123 2231 2312 3132 3213 3321 2132 2213 2321 3111 3222 3333 1123 1231 1312 3123 3231 3312 1132 1213 1321 2111 2222 2333 1233 1311 1122 2212 2323 2131 3221 3332 3113 2221 2332 2113 3233 3311 3122 1212 1323 1131 3212 3323 3131 1221 1332 1113 2233 2311 2122 1322 1133 1211 2331 2112 2223 3313 3121 3232 2313 2121 2232 3322 3133 3211 1331 1112 1223 3331 3112 3223 1313 1121 1232 2322 2133 2211 123456789ABC format: 147A 158B 169C 248C 259A 267B 349B 357C 368A 249B 257C 268A 347A 358B 369C 148C 159A 167B 348C 359A 367B 149B 157C 168A 247A 258B 269C 159C 167A 148B 257B 268C 249A 358A 369B 347C 258A 269B 247C 359C 367A 348B 157B 168C 149A 357B 368C 349A 158A 169B 147C 259C 267A 248B 168B 149C 157A 269A 247B 258C 367C 348A 359B 267C 248A 259B 368B 349C 357A 169A 147B 158C 369A 347B 358C 167C 148A 159B 268B 249C 257A Sudoku Grids (12,13,...,34): 123456789456789123789123456231564897564897231897231564312645978645978312978312645 123564978645789231897312456312456897564978123789231645231645789456897312978123564 123645897564789312978231456312564789456978231897123645231456978645897123789312564 159267348348159267267348159672483591591672483483591672834915726726834915915726834 159348267267159348348267159672591483483672591591483672834726915915834726726915834 159672834834159672672834159915267483483915267267483915591726348348591726726348591

Code: Select all: Setdoku grid 02 81 different symbols in 81 different squares All different attributes in Mini Row/Column cells Attributes 1-2 & 3-4 form 2 sudoku grids 123456789ABC format: 147A 258B 369C 157B 268C 349A 167C 248A 359B 269B 347C 158A 249C 357A 168B 259A 367B 148C 358C 169A 247B 368A 149B 257C 348B 159C 267A 157C 268A 349B 148B 259C 367A 248C 359A 167B 248B 359C 167A 269A 347B 158C 369B 147C 258A 369A 147B 258C 357C 168A 249B 157A 268B 349C 169C 247A 358B 259B 367C 148A 267B 348C 159A 257B 368C 149A 347A 158B 269C 358A 169B 247C 348A 159B 267C 168C 249A 357B 149C 257A 368B 123123123123 format: 1111 2222 3333 1212 2323 3131 1313 2121 3232 2332 3113 1221 2133 3211 1322 2231 3312 1123 3223 1331 2112 3321 1132 2213 3122 1233 2311 1213 2321 3132 1122 2233 3311 2123 3231 1312 2122 3233 1311 2331 3112 1223 3332 1113 2221 3331 1112 2223 3213 1321 2132 1211 2322 3133 1333 2111 3222 2232 3313 1121 2312 3123 1231 2212 3323 1131 3111 1222 2333 3221 1332 2113 3121 1232 2313 1323 2131 3212 1133 2211 3322 Sudoku grids 12 & 34: 159267348672483591834915726267159483483672915915834267348591672591726834726348159 159267348834915726672483591348591672591726834726348159915834267267159483483672915

These grids have extra features because they are canonical & can be utilised if declared in puzzles genertaed from them.

tarek
[EDIT: modified line puzzle characters & corrected Setdoku Grid 02]

by **tarek** » Sat Jan 15, 2011 12:16 pm

Here are 2 puzzles. These are machine generated to show minimal symmetric puzzles. They haven't been tested for difficulty

Code: Select all: Setdoku Puzzle 01 81 symbols in 81 cells ALL DIFFERENT sets in Mini Column/Row & Maxi Column/Row Attributes 1,2 & 3,4 form 2 vanilla sudoku grids. (Sq,X & colour out,colour in) .... 258B .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... 367B .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... 157C .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... 269C .... .... 2222 .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... 3312 .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... 1213 .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... 2333 .... .5...............9.............................................2...............6. .5...............2.............................................3...............9.

Code: Select all: Setdoku puzzle 02 81 symbols in 81 cells ALL DIFFERENT sets in Mini Column/Row, NO Maxi Column/Row Set rules Attributes 1,2 & 3,4 form 2 vanilla sudoku grids. (Sq,X & colour out,colour in) .... .... 369C .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... 358C .... .... 368A .... .... .... .... .... .... .... 349B .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... 157A .... .... .... .... .... .... .... 148A .... .... 159A .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... 149C .... .... .... .... 3333 .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... 3223 .... .... 3321 .... .... .... .... .... .... .... 3132 .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... 1211 .... .... .... .... .... .... .... 1121 .... .... 1231 .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... 1133 .... .... ..9...............8..9.......7.....................2.......1..2...............1.. ..9...............6..4.......8.....................1.......4..7...............9..

I'll try later to see if I can post an image using simon_blow_snow's symbols (probably for the 1st puzzle because it has only 4 clues

)
tarek
[EDIT: image for Setdoku puzzle 1 added]

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