Sudoku16x16Explainer - SE for 16x16 sudokus

Programs which generate, solve, and analyze Sudoku puzzles

Re: Sudoku16x16Explainer - SE for 16x16 sudokus

Postby 1to9only » Mon Nov 04, 2019 11:44 am

An updated version on the program (4 Nov 2019 release) can be downloaded here.
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Re: Sudoku16x16Explainer - SE for 16x16 sudokus

Postby tarek » Mon Nov 04, 2019 12:26 pm

1to9only wrote:An updated version on the program (4 Nov 2019 release) can be downloaded here.
Excellent. we may even get the chance of catching the Loch Ness Monster :D

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Re: Sudoku16x16Explainer - SE for 16x16 sudokus

Postby 1to9only » Mon Nov 04, 2019 12:55 pm

tarek wrote:we may even get the chance of catching the Loch Ness Monster :D

note the code is disabled in 2 places, SolvingTechnique and Solver - just reenable and rebuild before going fishing!
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Re: Sudoku16x16Explainer - SE for 16x16 sudokus

Postby tarek » Mon Nov 04, 2019 1:09 pm

1to9only wrote:
tarek wrote:we may even get the chance of catching the Loch Ness Monster :D

note the code is disabled in 2 places, SolvingTechnique and Solver - just reenable and rebuild before going fishing!
Good to know!
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Big Fishes

Postby 1to9only » Mon Nov 04, 2019 4:24 pm

Some of the big fishes can be found in the 300 puzzles tarek posted here:
Starfish: #009 #126 #152 #159 #185 #205 #215 #220 #234
Whale: #070 #163
Leviathan: #073 #216

There are a number of Quintuplets:
Naked Quintuplet: #004 #079 #083 #112 #168 #242 #278 #284
Hidden Quintuplet: #083 #136 #168 #247 #269

No Sextuplets, but I found a Naked Sextuplet in a puzzle I generated:
Code: Select all
....GF......M...
.D.F.L.A.O..KGI.
.CK.H.JE.M.P.F..
BN.PIDK.G...H.J.
..F.J.LKM..HDP.B
.......O....G.LN
.PI...HG.L.AFC..
...ND....CFO.HE.
.BG.EAP....IN...
..NDK.I.OB...AP.
PM.I....C.......
O.JEL..HFP.N.D..
.F.G...J.KHLE.CA
..H.A.E.PF.C.MN.
.OMB..D.E.G.P.F.
...K......OM.... ED=7.4/1.2/1.2

And no sightings of Septuplets, Octuplets or Loch Ness Monster (so named because the UFG has no name for an 8-fish).
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Re: Sudoku16x16Explainer - SE for 16x16 sudokus

Postby tarek » Mon Nov 04, 2019 5:12 pm

I know that this is not fair but here is how you to catch the LNM (which in my opinion is a worthy addition to the UFG):

susume in describing how to spot a Pure Jellyfish easily wrote:If a digit is not included in the 4x4 subset of givens, but does appear once in a row outside that subset, it forces the candidates for that digit into the remaining 4 rows of those 4 columns - i.e. a jellyfish. In Mauricio's last 5 puzzles, there are three such digits excluded from the 4x4 subset of givens and given once outside the subset - hence 3 jellyfish visible before any PMs.

in 16x16: You need a Puzzle with 64 of the clues in cells occupying the intersection 8 columns and 8 rows (an 8x8 set). Any value that doesn’t appear in the puzzle will construct an LMN in the remaining 8 rows and 8 columns :idea:

This suggests that we need a the above puzzle with one missing value and the LNM will be available from the start!

You have to thank the minds of Mauricio and susume who made this possible!!!

The Octuplet needs an empty region and will not be in any puzzle that doesn't have one. The Septuplet will need a region with 1 or 2 known clues to appear

tarek
[edit: this is funny but this is to amend the way I’ve written the above]
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Re: Sudoku16x16Explainer - SE for 16x16 sudokus

Postby tarek » Mon Nov 04, 2019 11:36 pm

tarek wrote:
1to9only wrote:
tarek wrote:we may even get the chance of catching the Loch Ness Monster :D

note the code is disabled in 2 places, SolvingTechnique and Solver - just reenable and rebuild before going fishing!
Good to know!

Enable all techniques in SolvingTechnique.java but de-select them by modifying the following in Settings.java:
Code: Select all
private void init() {
     techniques = EnumSet.allOf(SolvingTechnique.class);
     //default deselected techniques are added here
     techniques.remove(SolvingTechnique.Technique1Name);
     techniques.remove(SolvingTechnique.Technique2Name);
}

The techniques are De-Selected by default now. The GUI user is free then to Select/De-Select them from the Options>Select Technique.
If you want to remove the warning message about the disabled techniques upon Select technique frame closure then disable this line in SudokuFrame.java
Code: Select all
      refreshSolvingTechniques();
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Re: Sudoku16x16Explainer - SE for 16x16 sudokus

Postby 1to9only » Tue Nov 05, 2019 12:12 am

Noted. But I do not plan any further work on SE16, as I mentioned in my last post prior to today yesterday. If there is clamour for the disabled techniques, I suppose I can rebuild and rerelease. Enabling the disabled techniques will slow things down by between 3%-5%.
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Re: Sudoku16x16Explainer - SE for 16x16 sudokus

Postby tarek » Tue Nov 05, 2019 9:04 am

Now that I found an easy way to do it, I will do the same with Sukaku explainer. The more complex techniques that will degrade solving speed in general or the rare techniques that will be of interest to a minority will be de-selected by default. They would be available to select from the menu if required. If you happen to choose not to open the Techniques selection window then you wouldn’t know that these de-selected techniques even exist!
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Re: Sudoku16x16Explainer - SE for 16x16 sudokus

Postby tarek » Sat Nov 16, 2019 4:43 pm

Regarding naming big fish …

udosuk referring to vanilla sudoku wrote:What about 6x6, 7x7, 8x8, 9x9?

From the thread you mentioned vidarino regards 6x6 as a "whale", 7x7 as a "leviathan", while tarek has these suggestions:
tarek wrote:As for the naming, I suggest:

n=5, Starfish instead of Squirmbag
n=6, Seksfish:D (You can't object on this one Vidar)
n=7 Dogfish (7 letters)
n=8 Octupus
n=9 Enniafish
n=10 Hammerhead (10 letters) or Whaleshark


Of course only finned version of these big fishes are useful, because for "normal fish" exceeding 4x4 in size we'll just deal with their duals...


I honestly can't remember posting this but these were my attempts at naming fish that didn't materialize in the UFG. I'm happy that people are using Starfish instead of squirmbag though. I still love the LNM :lol:
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Re: Sudoku16x16Explainer - SE for 16x16 sudokus

Postby Mathimagics » Sat Nov 16, 2019 5:22 pm

John Cleese would be very disappointed not to see any sign of the legendary Venzuelan Beaver Fish ... :?
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Re: Sudoku16x16Explainer - SE for 16x16 sudokus

Postby tarek » Sat Nov 16, 2019 6:07 pm

Mathimagics wrote:John Cleese would be very disappointed not to see any sign of the legendary Venzuelan Beaver Fish ... :?
UFG was the "National Fish emporium" :lol:
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