Schliess ab !

Objective: Cover most of 81 squares filling them with your colors - acting by turns - On a 9x9 squared wooden board each player places a red tile, forming a boundary on one side of 81 small squares. As soon as you can close up (= schliess ab) one or more of these small squares you must fill in your colored slide(s). Being successful you must place another red tile. Game ends after all small squares are covered. Note: Likely published early 1970's