I'd seen this game in Denmark some years ago, and at the time I sat in a park watching for quite some time trying to discern the rules. This evening I finally got to play, and I must say this is perhaps the most enjoyable lawn game there is.
Two teams attempt to knock over their opponents blocks of wood by hurling lengths of dowel. There is a complicated series of rules for what happens when blocks are knocked down, with the large wooden "king" in the center as the final target.
We played until it started raining, then headed inside for the evening.