Grant Sanderson manages to combine his compelling narrative style with elegant animations. The solution to the chosen puzzle only depends on very straightforwar

Grant Sanderson manages to combine his compelling narrative style with elegant animations. The solution to the chosen puzzle only depends on very straightforward mathematical knowledge. Grant shows a possible route towards discovering the invariants that rule this puzzle. It is a kind of puzzle to try out on your own, knowing that a rather simple mathematical reasoning solves it. It doesn't rely on some obscure mathematical knowledge as might be suspected from an Olympiad problem. If you want to see Grant Sanderson, instead of only hearing his voice, he uploaded a Q&A where he explains his motivations. Mainly, creating educational math videos that other people would not be able to create.