So glad we came up for this:

This was a search phrase that brought one soul to DiD today:

“The two losing masters wanted a riposte, so the grand master showed them 5 hats, two white and three black. Then he said: 'I will turn off the light and put a hat on each of your heads and hide the other hats. When I turn on the light you will have equal chances to win. Each of you will see the hats of the two others, however not his own. The first one saying the colour of his hat will win.' Then before he could turn off the light, one of the masters (the same one again) guessed, what the colour of his hat will be.”

Awesome.