SudokuSolver Forum

The Preferences are always saved when the program quits. They're retained from one run to the other and even when you update to another version.

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Jean-Christophe
"When you have eliminated the impossible, whatever remains, however improbable, must be the truth." Sherlock Holmes.

I think that posting to a forum has the same effect as sending for an engineer to fix the washing machine. When the engineer arrives, I can never reproduce the fault.

I notice from my download record that I downloaded jSudoku on 26 April 2008. I have used it almost every day since then (at least 10 times). Up until the last post ("Taps"?), I had to do the following after each launch:

Increase the grid size.
Uncheck "Pencil marks on highlighted cells"
Check "Pencil marks on all cells"
Uncheck "Show timer"
Uncheck "Show split cages"
Uncheck "Solve all Naked Singles after Deduce"
Uncheck "Update Combinations after Solve"
Uncheck "Generate Grid at Start"

But after posting to the forum, all these settings are persistent. (I can see them in the registry.)

Strangely enough, I unboldened the fonts after the first launch, and the font settings have persisted.
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I asked jS for the innies of N9. These are highlighted in the attached graphic.

The status line shows that the total of the innies is 30.

When I use right-click > Show Combinations > Selected Cells, I get the info shown in the log, including the info for a sum of 30. All this is fine.

Question 1: Why does the log give combinations for sums 24, 25, ...?

Question 2: How can I put the "extra" information to good use? For example, how do I use the info "1 combinations for sum 24: {3678}"

BTW: You might notice the dashed lines in the log. These were inserted manually be me before asking for combinations. I might raise this issue in another post. (Only one subject per post.)
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1) The single request to add the combos doesn't know about the last request to add the Innies of N9. It also doesn't know about the naked pair {13}. You're using JSudoku as a minimal helper, so you combine the info.

2) You either need to spot either that the 3 is spoken for or that you need the 30 combo to satisfy the innies.

Of course the program knows all 3 pieces of information and can sort that out if you let it make the moves itself or ask for an explicit hint. It will go for the naked pair first.

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I have 81 brain cells left, I think.

Ah, yes. Quite so, erm.

Thanks for that.
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Apparently you used "Highlight Innies" which only highlights the innies and displays their sum in the status line, but does not define the split cage. For the latter, you should use "Solve: Innies". Difficult to see here since you've hidden the split cages.

Note: there are two combos related to selected cells:
1. right-click > Show Combinations > Selected Cells which displays every possible combination with the digits in the selected cells. If the split cage were defined and all its cells selected, it would have taken it into consideration and only list valid combination(s) for the cage.
2. right-click > Show Combinations > (Split) Cage... which will also list the valid combinations for the selected cells within the cage. In your example if you select right-click > Show Combinations > Cage 25/4 in r9c5..8 it will first list combinations for all cells in the cage, then for the two selected cells in r9c78 (this time taking the whole cage into consideration). This could help spotting patterns, for example a killer pair between r9c78 and another cell in N9.

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Jean-Christophe
"When you have eliminated the impossible, whatever remains, however improbable, must be the truth." Sherlock Holmes.

When using the "Outies minus innies" feature, I get the following status message:

Outies minus Innies of C4 = 5

After deleting a few candidates to satisfy the relationship, my keen analytical brain noticed that the relationship should have been:

Outies minus Innies of C4 = -5

(BTW: This was at the start of the puzzle, so very few candidates had actually been deleted. Otherwise, it would have been obvious.)

I use jSudoku simply to do the things that I would do with pencil and paper. In this case, I would manually have computed the sum to be "-5" (I did this as a check).

There was something else that I wanted to say, but I've forgotten

Innies/outies always turn the total to a positive number. The cells with blue background are added, those with red background are subtracted. So the formula should read: blue - red = number. This is not necessarilly the outies - innies, it could be innies - outies.
For overlaps, some of the blue or red cells may be added/subtracted several times.

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Jean-Christophe
"When you have eliminated the impossible, whatever remains, however improbable, must be the truth." Sherlock Holmes.

Version 1.4b1 released

Added solvers: Two String Kite, Empty Rectangle, Remote Pairs, BUG+1, Full House, Last Digit
Moved generator options to the Preferences dialog.
Added difficulty to control the generator.
Improved generator for overlapping variants
Updated the User Guide
...

See my web site for details.

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Jean-Christophe
"When you have eliminated the impossible, whatever remains, however improbable, must be the truth." Sherlock Holmes.

If you select Difficulty MEDIUM, the Solvers list contains a sub menu Medium. Is this correct?





When trying to minimize the Solvers list (independent of the selected Difficulty) often a large part of the Preferences window turns blue and locks up:

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Quis custodiet ipsos custodes?

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