# I had no idea that block stacking was a long-standing mathematical problem

But apparently “it is”:http://en.wikipedia.org/wiki/Block_stacking_problem. Well, long-standing, at least, since it is apparently “no longer a problem”:http://www.arxiv.org/abs/0707.0093

“Via”:http://www.chris-lamb.co.uk/2007/10/09/optimal-solution-for-the-block-stacking-problem-found/