Finding a puzzle based on known given squares

Everything about Sudoku that doesn't fit in one of the other sections

Finding a puzzle based on known given squares

Postby Aranlyde » Thu Apr 16, 2020 9:31 pm

Good evening,
Is there any way to find if a particular pattern of givens can produce a valid Sudoku puzzle?

I have the following 23-clue pattern, and want to know if a valid board can be created from it:
Code: Select all
...|XXX|..X
...|X..|..X
XX.|...|..X
---+---+---
XX.|..X|...
...|.X.|...
...|X..|.XX
---+---+---
X..|...|.XX
X..|..X|...
X..|XXX|...

I'm also curious if there's some known algorithm that could do a search based on given locations to check for a valid puzzle.
Aranlyde
 
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Joined: 16 April 2020

Re: Finding a puzzle based on known given squares

Postby coloin » Sat May 09, 2020 5:24 pm

Yes there are many puzzles with that pattern.
A 20 clue pattern might have 1M puzzles most of them minimal

Code: Select all
+---+---+---+
|...|765|..8|
|...|9..|..2|
|14.|...|..9|
+---+---+---+
|26.|..3|...|
|...|.7.|...|
|...|4..|.51|
+---+---+---+
|3..|...|.26|
|4..|..8|...|
|5..|214|...|
+---+---+---+


your pattern has 23 clues and for whatever reason ...... most of them are non minimal [have superfluos clues], and inherently easy solved with singles

puzzles are made with computor programs .... I have a program which I can put in the software section for anyone
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Joined: 05 May 2005

Re: Finding a puzzle based on known given squares

Postby 1to9only » Sat May 09, 2020 7:25 pm

Put the pattern into a text file, e.g. pattern.txt:
Code: Select all
...XXX..X...X....XXX......XXX...X.......X.......X...XXX......XXX....X...X..XXX...

Download the gsf program from here.
Run 'gsf.exe --help' for program options, redirecting the output to a text file is recommended.
Run this command to generate 100 unique and minimal puzzles for the given pattern:
Code: Select all
gsf.exe -n100 -gt -euniq()*(1==minimal) < pattern.txt > puzzles.txt

Sample puzzles.txt:
Hidden Text: Show
Code: Select all
...847..1...9....786......973...5.......2.......3...629......735....4...6..138... #    14 FN C25.m/S2.p
...287..5...1....986......361...5.......6.......9...744......285....4...3..728... #     9 FN C25.m/S2.p
...591..6...2....569......173...9.......3.......6...482......678....2...9..174... #    12 FN C25.m/S2.p
...526..3...7....218......571...4.......9.......8...345......672....8...3..967... #    13 FN C25.m/S2.p
...379..2...6....879......383...2.......1.......7...644......315....1...3..295... #    12 FN C25.m/S2.p
...386..9...5....286......797...1.......5.......8...364......237....8...6..192... #  2144 FNBTHWXY C25.m/S2.p
...417..2...2....312......587...6.......8.......9...516......349....4...7..893... #    22 FN C25.m/S2.p
...279..8...6....513......697...5.......3.......4...125......618....6...6..382... #    12 FN C25.m/S2.p
...216..4...4....634......919...7.......5.......8...359......714....1...5..378... #    13 FN C25.m/S2.p
...816..3...7....275......619...3.......6.......5...619......273....5...4..392... #    15 FN C25.m/S2.p
...615..4...4....952......691...4.......9.......1...928......753....6...4..732... #    21 FNB C25.m/S2.p
...672..1...9....347......219...7.......6.......1...562......453....8...7..254... #    11 FN C25.m/S2.p
...743..9...6....167......235...1.......8.......3...872......435....2...4..196... #    22 FNB C25.m/S2.p
...268..1...4....829......764...1.......5.......7...328......297....4...5..612... #   541 FNTXY C25.m/S2.p
...849..2...3....415......867...4.......7.......2...169......215....7...3..182... #   280 FNTY C25.m/S2.p
...763..5...1....349......137...6.......1.......3...428......649....8...5..649... #    14 FN C25.m/S2.p
...812..3...6....598......187...6.......4.......5...962......196....4...4..279... #    10 FN C25.m/S2.p
...192..5...6....859......796...8.......4.......5...844......593....4...2..735... #    14 FN C25.m/S2.p
...754..6...6....258......945...3.......7.......4...518......346....9...3..581... #    12 FN C25.m/S2.p
...628..7...4....964......839...5.......4.......7...612......135....9...4..371... #    21 FN C25.m/S2.p
...148..5...9....349......786...4.......3.......8...723......462....5...5..317... #    15 FN C25.m/S2.p
...496..2...1....814......331...5.......3.......7...692......516....8...5..927... #    19 FN C25.m/S2.p
...684..1...7....482......319...8.......1.......9...153......874....5...9..342... #    11 FN C25.m/S2.p
...349..2...1....675......946...8.......6.......2...711......859....1...5..827... #    12 FN C25.m/S2.p
...842..5...3....296......367...9.......7.......2...791......865....4...7..125... #    14 FN C25.m/S2.p
...542..9...3....463......117...4.......1.......8...468......524....5...5..278... #    21 FNB C25.m/S2.p
...238..5...5....458......642...9.......5.......4...821......496....4...8..176... #  1122 FNBTHWY C25.m/S2.p
...526..8...3....249......395...1.......7.......8...313......845....3...2..954... #   337 FNBHY C25.m/S2.p
...736..1...4....589......724...1.......9.......5...183......621....5...4..267... #    11 F C25.m/S2.p
...854..3...6....763......829...8.......2.......9...658......497....1...5..796... #    11 FN C25.m/S2.p
...798..1...4....378......262...3.......7.......5...393......461....4...2..835... #   422 FNBTHX C25.m/S2.p
...415..7...3....842......113...7.......9.......1...368......245....4...7..862... #    12 FN C25.m/S2.p
...647..1...5....213......428...3.......6.......2...675......239....2...7..195... #    13 FN C25.m/S2.p
...589..1...1....379......614...2.......1.......6...272......346....3...8..796... #    12 FN C25.m/S2.p
...579..3...3....297......676...3.......5.......7...182......498....2...6..915... #    20 FNB C25.m/S2.p
...173..9...2....564......171...5.......2.......9...748......365....2...1..734... #     8 F C25.m/S2.p
...983..1...2....478......684...5.......2.......1...984......736....1...5..732... #    18 FNB C25.m/S2.p
...671..9...3....812......738...9.......3.......4...729......457....5...8..164... #     9 FN C25.m/S2.p
...734..5...9....429......696...2.......9.......4...516......783....1...4..657... #    15 FN C25.m/S2.p
...953..2...6....459......116...8.......4.......1...298......569....7...4..526... #   235 FNBTH C25.m/S2.p
...836..2...4....135......992...4.......5.......7...388......971....7...4..683... #    12 FN C25.m/S2.p
...623..9...4....576......117...8.......9.......2...538......763....4...6..739... #   277 FNBY C25.m/S2.p
...359..1...1....672......935...8.......1.......6...546......928....6...1..723... #    18 FNB C25.m/S2.p
...146..2...5....643......578...5.......9.......3...749......175....7...2..981... #    19 FN C25.m/S2.p
...619..3...8....476......282...1.......4.......9...153......475....6...9..237... #    14 FN C25.m/S2.p
...476..3...3....564......797...8.......9.......1...565......618....4...2..863... #    10 FN C25.m/S2.p
...216..7...4....516......947...5.......3.......8...927......146....9...5..147... #   234 FNBTH C25.m/S2.p
...986..4...1....269......347...9.......2.......3...895......173....5...9..831... #    10 FN C25.m/S2.p
...671..2...5....491......523...9.......4.......7...585......167....4...1..368... #    15 FN C25.m/S2.p
...479..6...2....543......926...1.......2.......7...585......813....2...9..513... #   275 FNBY C25.m/S2.p
...178..4...5....651......796...5.......9.......4...288......627....1...3..924... #  1041 FNTWY C25.m/S2.p
...759..8...3....756......119...8.......9.......5...294......326....3...8..146... #   280 FNBTY C25.m/S2.p
...915..7...6....296......541...8.......7.......2...387......542....7...3..194... #    14 FN C25.m/S2.p
...328..5...6....293......116...2.......8.......4...794......963....5...8..169... #    21 FNB C25.m/S2.p
...432..8...9....432......551...6.......9.......8...697......529....1...8..627... #    11 FN C25.m/S2.p
...516..8...4....581......393...7.......5.......9...266......397....8...3..692... #    16 FN C25.m/S2.p
...493..8...8....782......567...1.......7.......9...145......369....8...7..312... #    15 FN C25.m/S2.p
...687..2...1....697......824...3.......6.......4...591......874....2...7..358... #   267 FNBY C25.m/S2.p
...145..7...8....631......589...6.......8.......9...517......236....2...9..751... #    37 FNBT C25.m/S2.p
...612..9...3....857......148...5.......3.......2...171......927....9...9..824... #    14 FN C25.m/S2.p
...652..8...4....539......656...9.......1.......8...432......314....7...7..238... #    10 F C25.m/S2.p
...263..4...8....297......654...9.......8.......3...894......158....6...2..951... #    15 FN C25.m/S2.p
...489..3...7....586......424...8.......9.......6...313......785....4...6..531... #   528 FNBXY C25.m/S2.p
...276..4...5....174......531...9.......1.......4...921......682....4...9..823... #    11 FN C25.m/S2.p
...536..8...8....487......172...9.......6.......2...935......871....5...6..417... #    12 FN C25.m/S2.p
...849..5...1....917......291...6.......8.......3...514......672....5...3..624... #    14 FN C25.m/S2.p
...821..7...5....635......889...4.......7.......1...839......316....7...7..395... #    11 FN C25.m/S2.p
...697..2...5....847......513...6.......1.......2...147......318....1...6..758... #   277 FNBY C25.m/S2.p
...319..2...6....189......345...6.......9.......4...757......582....1...3..582... #    12 FN C25.m/S2.p
...678..9...4....537......429...6.......8.......5...416......578....3...1..957... #    17 FN C25.m/S2.p
...294..1...1....752......446...1.......8.......7...393......768....6...2..438... #    12 F C25.m/S2.p
...643..2...2....163......759...8.......7.......9...141......853....4...9..315... #   275 FNBX C25.m/S2.p
...627..5...9....263......921...3.......8.......1...733......261....8...7..264... #    16 FN C25.m/S2.p
...928..4...1....986......765...3.......1.......8...427......852....9...3..285... #    18 FNB C25.m/S2.p
...195..2...3....846......382...6.......7.......4...697......541....8...2..513... #    15 FN C25.m/S2.p
...713..2...5....715......938...2.......4.......3...486......248....9...9..167... #    17 FN C25.m/S2.p
...287..5...3....684......749...2.......3.......6...825......147....6...3..845... #    17 FN C25.m/S2.p
...975..6...8....249......852...8.......9.......5...477......319....2...8..314... #  1117 FNBHY C25.m/S2.p
...432..7...1....249......124...5.......1.......6...838......293....7...1..958... #   281 FNBTY C25.m/S2.p
...459..2...8....623......958...4.......6.......2...481......759....5...4..791... #    10 FN C25.m/S2.p
...758..3...6....148......629...6.......7.......8...973......427....3...8..514... #    13 FN C25.m/S2.p
...561..2...2....762......489...2.......5.......9...657......134....6...3..745... #     9 FN C25.m/S2.p
...237..8...1....237......421...9.......8.......5...376......497....4...9..316... #    14 FN C25.m/S2.p
...271..6...5....236......117...2.......8.......3...799......687....4...4..825... #    11 FN C25.m/S2.p
...452..8...8....498......173...1.......4.......7...931......254....8...6..573... #    11 FN C25.m/S2.p
...851..9...4....831......743...2.......4.......7...929......617....5...6..318... #    11 FN C25.m/S2.p
...196..2...7....482......938...1.......6.......9...864......739....7...6..425... #    41 FNBT C25.m/S2.p
...726..8...5....257......126...7.......6.......8...577......149....4...6..281... #    51 FNBT C25.m/S2.p
...916..2...3....751......887...2.......3.......7...619......247....3...3..624... #    10 FN C25.m/S2.p
...937..1...8....532......987...9.......7.......2...541......637....1...9..653... #    10 FN C25.m/S2.p
...546..3...8....789......142...5.......6.......2...191......459....3...3..128... #    12 FN C25.m/S2.p
...839..2...2....431......693...6.......4.......9...585......374....2...2..318... #    17 FNB C25.m/S2.p
...791..4...8....315......298...4.......7.......5...673......892....7...6..318... #    11 FN C25.m/S2.p
...361..9...7....461......293...6.......4.......2...518......472....3...3..479... #    15 FNB C25.m/S2.p
...713..4...4....813......656...9.......3.......8...919......732....8...4..597... #    11 FN C25.m/S2.p
...154..9...2....798......421...5.......6.......3...788......315....9...7..843... #    16 FNB C25.m/S2.p
...492..8...7....627......541...5.......2.......8...536......127....4...3..186... #    14 FN C25.m/S2.p
...163..7...2....641......538...9.......5.......8...921......438....4...2..631... #    18 FN C25.m/S2.p
...815..3...6....725......642...3.......6.......2...788......149....4...1..987... #    12 FN C25.m/S2.p
...769..3...8....194......663...7.......3.......5...683......498....1...2..976... #    14 FN C25.m/S2.p

.
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Re: Finding a puzzle based on known given squares

Postby denis_berthier » Sun May 10, 2020 3:31 am

coloin wrote:I have a program which I can put in the software section for anyone

Hi coloin
Can your program run on Unix / MacOS? If yes, I'm interested.
I remember using gsf's program for this purpose, but I'm unable to find it (the link in the other answer is only for Windows).
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Re: Finding a puzzle based on known given squares

Postby SpAce » Sun May 10, 2020 4:05 am

Hi Denis,

denis_berthier wrote:
coloin wrote:I have a program which I can put in the software section for anyone

Hi coloin
Can your program run on Unix / MacOS? If yes, I'm interested.
I remember using gsf's program for this purpose, but I'm unable to find it (the link in the other answer is only for Windows).

If you do find a non-Windows version of gsf's program, please let me know. Of course there are many ways to run Windows (or just Windows programs) on a Mac, but I've been too lazy and too allergic to do it. Apparently so have you. I'm still planning to do so at some point, because I'd like to test e.g. XSudo and YZF_Sudoku too. I haven't yet gathered enough motivation, even though I'm sure both programs are really good :)

Btw, if you don't want to install Windows on your own machine (even in a VM), you can always get a cloud instance and use it there if you don't mind the network lag. It's possible in both AWS and Azure (of course), for example.
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Re: Finding a puzzle based on known given squares

Postby denis_berthier » Sun May 10, 2020 7:44 am

SpAce wrote:If you do find a non-Windows version of gsf's program, please let me know. Of course there are many ways to run Windows (or just Windows programs) on a Mac, but I've been too lazy and too allergic to do it. Apparently so have you. I'm still planning to do so at some point, because I'd like to test e.g. XSudo and YZF_Sudoku too. I haven't yet gathered enough motivation, even though I'm sure both programs are really good :)
Btw, if you don't want to install Windows on your own machine (even in a VM), you can always get a cloud instance and use it there if you don't mind the network lag. It's possible in both AWS and Azure (of course), for example.

I don't have enough motivations to install Windows on my Mac. I too would like to try XSudo (I tried the online version of YZF_Sudoku), but not enough to install Windows just for this purpose.

As for gsf's program, I may be wrong about using it on my Mac. I've been unable to find it. What I'm sure is, I used his sudz program (a decompressor) to generate full grids from his bands data. This was so long ago that I may be confusing the two.
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Re: Finding a puzzle based on known given squares

Postby 1to9only » Sun May 10, 2020 9:19 am

the gsf c source was posted here. it compiles fine in windows, so i think a unix/mac version should not be a problem.
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gsf linux

Postby eleven » Sun May 10, 2020 9:50 am

I had used the linux version of gsf's program, called sudoku-linux.i386.
But it does not work anymore on 64 bit linux, needing the 32 bit version of libbz2.so.1, which i cannot install.
If you want to try, i have attached it.
Attachments
sudoku-linux.i386.zip
(167.07 KiB) Downloaded 13 times
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Re: Finding a puzzle based on known given squares

Postby denis_berthier » Sun May 10, 2020 10:10 am

1to9only wrote:the gsf c source was posted here. it compiles fine in windows, so i think a unix/mac version should not be a problem.

On my Mac (Catalina, 64bits), I can't even uncompress the 6 files.
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Re: gsf linux

Postby denis_berthier » Sun May 10, 2020 10:12 am

eleven wrote:I had used the linux version of gsf's program, called sudoku-linux.i386.
But it does not work anymore on 64 bit linux, needing the 32 bit version of libbz2.so.1, which i cannot install.
If you want to try, i have attached it.

Thanks, but same as you. It can't run on 64-bit only Catalina version of MacOS
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Re: Finding a puzzle based on known given squares

Postby eleven » Sun May 10, 2020 11:45 am

1to9only wrote:the gsf c source was posted here. it compiles fine in windows, so i think a unix/mac version should not be a problem.

Yes, that worked, thanks:

cat ast-sudoku.2012-08-01.z01.zip ast-sudoku.2012-08-01.z02.zip ast-sudoku.2012-08-01.z03.zip ast-sudoku.2012-08-01.z04.zip ast-sudoku.2012-08-01.z05.zip ast-sudoku.2012-08-01.zip > gsf.7
7z e gsf.7
gcc sudzlib.c sudata.c subcanon.c sudoku.c -o gsf

Tested:
echo '...XXX..X...X....XXX......XXX...X.......X.......X...XXX......XXX....X...X..XXX...' > pattern.txt
./gsf -n100 -gt -euniq'()*(1==minimal)' < pattern.txt > puzzles.txt
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Re: Finding a puzzle based on known given squares

Postby denis_berthier » Mon May 11, 2020 4:46 am

eleven wrote:
1to9only wrote:the gsf c source was posted here. it compiles fine in windows, so i think a unix/mac version should not be a problem.

Yes, that worked, thanks:
cat ast-sudoku.2012-08-01.z01.zip ast-sudoku.2012-08-01.z02.zip ast-sudoku.2012-08-01.z03.zip ast-sudoku.2012-08-01.z04.zip ast-sudoku.2012-08-01.z05.zip ast-sudoku.2012-08-01.zip > gsf.7

Until here OK, you turn the 6 files into one.

eleven wrote:7z e gsf.7

I tried to open it with Unarchiver and with Keka on my Mac, but both say the archive is incomplete.

I also tried unzip instead, and I get more detailed error messages:
Hidden Text: Show
Archive: gsf.7
warning [gsf.7]: zipfile claims to be last disk of a multi-part archive;
attempting to process anyway, assuming all parts have been concatenated
together in order. Expect "errors" and warnings...true multi-part support
doesn't exist yet (coming soon).
warning [gsf.7]: 972800 extra bytes at beginning or within zipfile
(attempting to process anyway)
file #1: bad zipfile offset (local header sig): 972804
(attempting to re-compensate)
inflating: README
creating: lib/
creating: lib/package/
inflating: lib/package/ast-sudoku.html
inflating: lib/package/ast-sudoku.pkg
inflating: lib/package/ast-sudoku.README
extracting: lib/package/ast-sudoku.req
inflating: lib/package/ast-sudoku.ver
inflating: lib/package/ast.def
inflating: lib/package/ast.lic
inflating: lib/package/epl.def
creating: src/
creating: src/cmd/
creating: src/cmd/sudoku/
inflating: src/cmd/sudoku/bbss.c
inflating: src/cmd/sudoku/canon.c
inflating: src/cmd/sudoku/constraint_A.c
inflating: src/cmd/sudoku/constraint_J.c
inflating: src/cmd/sudoku/constraint_U.c
inflating: src/cmd/sudoku/constraint_Z.c
creating: src/cmd/sudoku/data/
inflating: src/cmd/sudoku/data/m-2.dat
inflating: src/cmd/sudoku/data/m-54.dat
inflating: src/cmd/sudoku/data/multiple-1.tst
inflating: src/cmd/sudoku/data/multiple-2.tst
inflating: src/cmd/sudoku/data/png
inflating: src/cmd/sudoku/data/w-1.dat
inflating: src/cmd/sudoku/data/x-1.dat
inflating: src/cmd/sudoku/data/x-2.dat
inflating: src/cmd/sudoku/data/y-1.dat
inflating: src/cmd/sudoku/data/y-2.dat
inflating: src/cmd/sudoku/faq.sudoku.mm
inflating: src/cmd/sudoku/Makefile
inflating: src/cmd/sudoku/Mamfile
inflating: src/cmd/sudoku/NOTES
inflating: src/cmd/sudoku/pseudocoup.c
inflating: src/cmd/sudoku/pseudocoup.rt
inflating: src/cmd/sudoku/pseudocoup.tst
inflating: src/cmd/sudoku/README
inflating: src/cmd/sudoku/RELEASE
inflating: src/cmd/sudoku/subcanon.c
file #42: bad zipfile offset (local header sig): 328
(attempting to re-compensate)
file #42: bad zipfile offset (local header sig): 328
file #43: bad zipfile offset (local header sig): 979160
file #44: bad zipfile offset (local header sig): 980480
file #45: bad zipfile offset (local header sig): 982048
file #46: bad zipfile offset (local header sig): 1017715
file #47: bad zipfile offset (local header sig): 1111731
file #48: bad zipfile offset (local header sig): 1123040
file #49: bad zipfile offset (local header sig): 1159033
file #50: bad zipfile offset (local header sig): 1071226
file #51: bad zipfile offset (local header sig): 1072999
file #52: bad zipfile offset (local header sig): 991118
file #53: bad zipfile offset (local header sig): 997385
file #54: bad zipfile offset (local header sig): 1061541
file #55: bad zipfile offset (local header sig): 1152872
file #56: bad zipfile offset (local header sig): 1156010
file #57: bad zipfile offset (local header sig): 1156581
file #58: bad zipfile offset (local header sig): 1159721
file #59: bad zipfile offset (local header sig): 1163625
file #60: bad zipfile offset (local header sig): 1043740
file #61: bad zipfile offset (local header sig): 1080190
file #62: bad zipfile offset (local header sig): 1133736
inflating: src/cmd/sudoku/testsudocoup.out
inflating: src/cmd/sudoku/testsudocoup.sh
inflating: src/cmd/sudoku/testsudoku.out
inflating: src/cmd/sudoku/testsudoku.sh


eleven wrote:gcc sudzlib.c sudata.c subcanon.c sudoku.c -o gsf

As should be expected from the previous messages, errors here also
Hidden Text: Show
clang: error: no such file or directory: 'sudzlib.c'
clang: error: no such file or directory: 'sudata.c'
clang: error: no such file or directory: 'subcanon.c'
clang: error: no such file or directory: 'sudoku.c'
clang: error: no input files
denis_berthier
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Joined: 19 June 2007
Location: Paris

Re: Finding a puzzle based on known given squares

Postby eleven » Mon May 11, 2020 9:11 am

I am sorry, Denis. Since i had encountered errors, when i wanted to uncompress it, i tried different things, and at the end i did not know, which one worked. (The way i thought is my normal way to unzip multiple parts of 7z-compressed data).

But it should work like R. Jamil said, though it cannot be extracted with unzip, which confused me.

So please try following:

mv ast-sudoku.2012-08-01.z02.zip ast-sudoku.2012-08-01.z02
mv ast-sudoku.2012-08-01.z01.zip ast-sudoku.2012-08-01.z01
mv ast-sudoku.2012-08-01.z03.zip ast-sudoku.2012-08-01.z03
mv ast-sudoku.2012-08-01.z04.zip ast-sudoku.2012-08-01.z04
mv ast-sudoku.2012-08-01.z05.zip ast-sudoku.2012-08-01.z05

Then ask your archiver to extract ast-sudoku.2012-08-01.zip.
eleven
 
Posts: 2414
Joined: 10 February 2008

Re: Finding a puzzle based on known given squares

Postby 1to9only » Mon May 11, 2020 9:46 am

I've repackaged the 6 files into a single zip file - Download from here.
It is on a free file storage web site, and it will be deleted after about 2 weeks.

file: ast-sudoku.2012-08-01.zip
size: 1,191,372 bytes
md5: b2b1c5c9b51771b2c2a2f7136045047b
1to9only
 
Posts: 1792
Joined: 04 April 2018

Re: Finding a puzzle based on known given squares

Postby denis_berthier » Mon May 11, 2020 10:51 am

Hi eleven and 1to9only,
thanks to both of you.
It works.
denis_berthier
2010 Supporter
 
Posts: 1544
Joined: 19 June 2007
Location: Paris

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