Available today!

Prior owners of Chess King get a discount for upgrading and get on top of that 3 months of 74 Chess King Courses on web & mobile. You need this upgrade if your previous version ran on Mac OS X 10.13 High Sierra or OS 10.14 Mojave or previous and you upgraded to either 10.15 Catalina or 11 Big Sur or OS 12 Monterey. Apple changed the OS with Catalina which broke compatibility with all 32-bit apps, which forced us to make a new version. This is the same product as the Chess King 22 for Mac, simply you get a discount for being a prior Chess King user. To qualify for this offer, you need to provide your previous Chess King serial number. If you have a Chess King 21, it's worth upgrading to Chess King 22 to get the GigaKing database with now 8 million games, update GigaTree and some more program improvements.

If you have any questions, please write to diego@chessking.com