Othello/Reversi game that runs in Kojo. See Kojo in: https://www.kogics.net/kojo
If you have the latest version of Kojo, Othello is available from the Showcase menu.
If you have any version earlier than 2.9.11 r3 Build date: 9 July 2021, just open the file ./kojo/menu.kojo in Kojo and run.
More info on the game can be found in https://en.wikipedia.org/wiki/Reversi and in https://www.worldothello.org/
Originally implemented in Turkish (Kojo runs in Turkish, too!). Later translated to English along with a few improvements.
The history of development and the original Turkish code is in: https://github.com/bulent2k2/kojo-denemeler.git
E.g., https://github.com/bulent2k2/kojo-denemeler/blob/master/otello/tr/menu.kojo