Nope.
International Draughts has not been solved and is more in depth.
If you like http://lichess.org
Then you should also try http://lidraughts.org
Try Google.
https://en.m.wikipedia.org/wiki/International_draughts
https://www.google.com/search?q=international+draughts&oq=in&gs_lcrp=EgZjaHJvbWUqBggAEEUYOzIGCAAQRRg7MgYIARBFGDsyBggCEEUYPDIGCAMQRRg8MgYIBBBFGDwyBggFEEUYPDIGCAYQRRg8MgYIBxBFGDkyBggIEEUYOzIJCAkQABhDGIoF0gEIMTM5N2owajSoAgCwAgA&client=ms-android-verizon-us-rvc3&sourceid=chrome-mobile&ie=UTF-8
Nope.
International Draughts has not been solved and is more in depth.