Installation
For Linux: Your distribution should have it packaged for you.
For Windows: Please see https://www.linux-apps.com/p/1109453/ for a Windows installer.
If you want to download the source and install manually:
git clone https://invent.kde.org/games/kajongg.git
For Linux:
cd kajongg ; mkdir build ; cd build; cmake .. && make && make install
For Windows: Please read
README.windows
Kajongg depends on those packages: (debian package names in parentheses)
Python 3.5 or higher (python3)
Qt5.7 or higher (python3-pyqt5 and python3-pyqt5.qtsvg)
the python bindings for Qt5 (python3-pyqt5)
the python twisted library 16.6.0 or higher (python3-twisted)
sqlite3 (libsqlite3-0)