In all my years of writing software, I have never had such rapid and high-quality beta testing as I did with the puzzle collection I mentioned in this diary recently. Evidently writing programs that people can use to waste time is a fantastic way to get a lot of testing very quickly. (Not that that should have surprised me, in retrospect, but.)

As a result I've now decided the beta period is over. There will still be bugs to fix, and I'll continue development as and when I have the time and energy, but I reckon these games now work plausibly enough to open them to world scrutiny. So in the unlikely event that anyone who read my previous entry on the subject was absolutely dying to link to my puzzles page and scrupulously didn't do so, they should now feel free :-)

Also, I've just added a fifth game to the page. If you're bored of the other four, go and play Rectangles for a while…

http://www.chiark.greenend.org.uk/~sgtatham/puzzles/