Polder is a game inspired by this same Dutch word, which describes the terrain gained from the sea since XII century. To do so, they pumped the water out with windmills. The goal of each player is to be the first one to form a continuous canal that connects the windmill with the polder or center of the board. Pieces shall be grouped by size out of the board. Next, each player chooses a windmill from the board and takes either one of these actions: place a piece on its ring, turn around a whole ring -just a quarter-, change a piece of the board for a new one. In case of a tie, the player with more small windmills in the canal to the center wins.