Wikipedia:Quadradius

Quadradius is a 2007 browser-based turn-based strategy video game, created by Jimmi Heiserman and Brad Kayal.

Gameplay
Quadradius is a board game superficially similar to checkers (draughts) for up to 6 players. The purpose is to eliminate all of one's opponent's pieces by jumping on top of them with your own. Basic movement with the pieces is a single square up, down, left or right, but power-ups spawn randomly on the board that allow for a wide range of powers, including deforming the board itself.

Reception
At the 2008 Independent Games Festival, Quadradius won third place in the Gleemie Awards.

In 2011, Quadradius was listed in the book 1001 Video Games You Must Play Before You Die.