Public bug reported:
Binary package hint: gnome-games
When I use the arrow keys to select one of the squares that are given at
the start of a puzzle (the squares with bold numbers that you aren't
supposed to change, the ones that you can't use the mouse to select) and
use the Fill feature (either with ctrl-f or pressing the "Fill" button),
sometimes the number in the square will change. It seems like it changes
depending on what other numbers would be valid in that square and only
when there are two valid numbers.
For example, in one particular case if this "locked" square were
"unlocked" and didn't have a number in it, either a 6 or a 2 would be
valid for that spot (i.e. pressing the hint button would yield the
numbers 6 and 2). However, this is a "locked" spot with the number 6 in
it and when I arrow over to it and press the Fill button (or ctrl-f)
this "locked" square changes into a 2. Pressing the Fill button again
changes it back into a 6. It's not randomly choosing whether a 6 or a 2
should go there because it will always switch to the other number.
I haven't checked out the source code but it seems most likely to me
that when the "fill" function is narrowing down the numbers that can fit
in that spot legally and is checking the numbers in the containing
group-of-9, it is mistakenly ruling out the number in its own square as
well and then ignoring that fact that that square is uneditable.
The guidelines state that I should include what I expected to happen,
but I think it's pretty obvious that I expect all "locked" squares (the
squares that are given when you start the puzzle) to remain uneditable
in all ways. In the paper versions of Sudoku you can't just erase the
beginning numbers and write in your own - that's cheating :)
ProblemType: Bug
Architecture: amd64
DistroRelease: Ubuntu 9.04
MediaBuild: Ubuntu 9.04 "Jaunty Jackalope" - Release amd64 (20090420.1)
NonfreeKernelModules: fglrx
Package: gnome-games 1:2.26.1-0ubuntu2
ProcEnviron:
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: gnome-games
Uname: Linux 2.6.28-14-generic x86_64
** Affects: gnome-games (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug
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Sudoku autofill changes "locked" squares
https://bugs.launchpad.net/bugs/409681
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