Congo is a chess variant invented by Demian Freeling in 1982 when he was nearly 8 years old.[1][2] His father (Dutch abstract games designer Christian Freeling) encouraged him to design a variant using a 7×7 gameboard. Demian was already familiar with chess and xiangqi, and the result blends some features from both. Congo became the second-most popular chess variant at the Fanaat games club in Enschede, the Netherlands.
For his Congo engine, Ed van Zon won "Best of the Zillions" First Contest, Best Chess-Related Category in March 2001.[3]