Alex....
Cool!
I downloaded a shareware product called MacSodoku and entered your
Puzzle #1 into it and solved it in less than five minutes. It was
great fun and very satisfying. But I think your program could be very
valuable as a sort of training-wheels approach to learning to think
in patterns that solve these delightful puzzles.
I'll download your new version and give it a shot today.
Dan
On Aug 1, 2005, at 5:58 AM, Alex Tweedly wrote:
Dan Shafer wrote:
I'm doing something wrong or misunderstanding how the assistant
works or something.
On Puzzle #1, I got to the place where I have five uncompleted
cells. One of them has a "?" which I think means there's an error
somewhere. But neither it nor the cell underneath it show any
potential values when I click on them. Then I click on an
adjoining square to the one without a "?" and select a value.
Odds go to 0, so I know I've got a wrong value there. I "Undo"
and now I have three squares -- the two original and the one I
just undid -- that show no values to pick from when I click on
them. SO essentially, even though I think I could solve the
puzzle at this point, the assistant won't let me proceed.
Bug? Something I'm not grokking?
One bug, one not-yet-implemented feature and maybe something you
weren't fully grokking. (And for all I know, more bugs still to
come ....)
The bug I found and fixed was in undo-ing after there were squares
for which no value remained possible. Although they showed on-
screen as a "?", the "?" wasn't being saved in the Undo/Redo state,
so subsequent "Undo"s could leave blank squares.
I'm not sure how that led to the problem you described to me - so
I've also added an automatic logging facility. All actions are
logged (to a custom property), and there is a new menu item -
File / Save Log File ... which will save the log file. So if
anyone encounters strange situation, they can simply save the log
file and email it to me.
The not-yet-implemented feature is that it ought to stop you
assigning values to any more squares once any square has no
remaining possible values. I will add that - but in the mean time,
keep an eye on the number of possibilities, and if it reaches 0
then you will need to Undo (one or more times), so you may as well
do it immediately. (I figure if you had fully grokked things, you
wouldn't have continued ....)
Ver 1.3 has been uploaded to RevOnline, with these two changes.
Ver 1.4 will come later today, with an additional feature of
showing a detailed breakdown of a single step (i.e. which squares
change and why), which will be a useful way to see what the
Assistant is doing for you (and indirectly to check that it does
the right thing). That info is actually already gathered in the
log file, but I'm looking for a graphical way to show it.
And this is actually being much more interesting than I had
expected - so there may well be a Version 2 that eliminates some of
the cruft that has sprung up in the various Ver 1.x's as it has
grown organically.
--
Alex Tweedly http://www.tweedly.net
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