The greatest number you can imagine

How many different games of chess are possible? Everyone knows it’s a very, very large number. It can be written down in seconds, using just a few digits, is unimaginably huge. Unimaginable? The great scientist Enrico Fermi recommended that we at least try to understand very large numbers, to estimate what they entail. Mathematics professor Christian Hesse attempts to do this for the number of chess games. You will be stunned!