Checkers update: 0.2
As always go to releases; the overview (and binaries) are there; extra notes follow. I've found debugging a Mac OS 8/9 program to be quite difficult and time-consuming, at least after adding mouse support and attempting to add a background thread for the engine. Things often work as expected with Carbon under Mac OS X, but crash under Mac OS 9/Classic… which on the one hand isn't a reason not to use Carbon, since it would still be legitimate to only target Carbon/OS X, but on the other sort of means you must be doing something wrong somehow with the APIs, though it's hard to know what.
Nevertheless, now I've gone to Cocoa, which of course also means it should run on new versions of macOS rather than just 10.14 and below. (It compiles on new versions, and should run on any version from 10.3; built without DNS-SD it would also run on 10.0-10.2.)
Among other issues I've yet to do really anything to generalize assets (all the board's and pieces' vertices are still in a header file, models.h).
As this is the first actual release for Android, perhaps it's a good place to mention Android developer verification…