Arimaa is a two player, turn-based game with simple rules and deep strategy. It is significantly more complex than chess, yet is easy for people to learn and play (and very hard for computers). You can play people or bots (like this one) online.
Wikipedia tells us that Rhadamanthus was a "wise king, the son of Zeus and Europa...According to one account, Rhadamanthus ruled Crete before Minos, and gave the island an excellent code of laws, which the Spartans were believed to have copied."
Rhadamanthus is also the sophotech ("smart machine") of the Silver-Gray Manorial Schola in John C. Wright's far-future space opera, the Golden Age Trilogy. He (Rhadamanthus) takes the physical form of a flying penguin, and is one of the most interesting characters in the series. Since he is a wholly man-made intelligence, I thought naming an Arimaa bot after him was appropriate.
See LICENSE.rst for licensing details and restrictions that apply under the Arimaa Public License.