More like a jigsaw puzzle. The recent run from way above freezing back to freezing has left the lake in distress. The surface is carved into triangles--many not much bigger than a coffee table. The question: Do these fractured seams have the same strength as the surrounding ice once they re-freeze--or will they break again at the first opportunity? It is a bit unnerving to walk across the surface with so many cracks and with such a clear view of the lake bottom! It looks very cold down there. So far so good.