Danny McGrath's guess was correct. The execution loops in Puzzle::createPartial() until a solution is found.
I have made a upstream bug report: https://bugs.kde.org/show_bug.cgi?id=245756 ** Bug watch added: KDE Bug Tracking System #245756 http://bugs.kde.org/show_bug.cgi?id=245756 ** Also affects: kdegames via http://bugs.kde.org/show_bug.cgi?id=245756 Importance: Unknown Status: Unknown -- KSudoku freezes when starting 25x25 game https://bugs.launchpad.net/bugs/552315 You received this bug notification because you are a member of Registry Administrators, which is the registrant for KDE Games. _______________________________________________ Mailing list: https://launchpad.net/~registry Post to : [email protected] Unsubscribe : https://launchpad.net/~registry More help : https://help.launchpad.net/ListHelp

