Boardgamegeek https://boardgamegeek.com/boardgame/528/zertz
English - In ZÈRTZ, the third addition to the GIPF Project, players compete to acquire sets of multi-colored balls. This is mostly accomplished by jumping one ball over one or more others, Checkers-style, on a hex board. A player's turn consists of either jumping (which can be forced) or placing any color ball on the board and removing an empty space from the edge of the board.
Official https://www.gigamic.com/jeu/zertz
French - Les deux joueurs jouent sur un plateau dynamique avec des billes blanches, grises et noires. L'objectif est de capturer certaines combinaisons de billes. Manche après manche le plateau devient plus petit et chaque coup peut faire la différence.