The "pentamind" is a competition where the goal is to place high in tournaments of 5 different kinds of mental games (for example it might be go, chess, poker, backgammon, and othello) happening at the "mind sports olympiad." It's sort of like the "decathlon" in physical sports, except the decathlon has 10 known standard events, whereas in pentamind the players get to choose which games to contest (subject to certain constraints, e.g. not allowed to do two "chess-like" games). Demis Hassabis, recently in the news about "AlphaGo," won this event 5 times, more than anybody else. It looks like a goodly percentage of the winners have something to do with mathematics. Un(?)fortunately it looks in recent years like the strategy used to win is to choose some rather unusual (silly?) games hardly anybody ever heard of. For example the games of "entropy," "triolet," "boku," and "snatch," whatever they are, "losing checkers," etc. There are too many games. -- Warren D. Smith http://RangeVoting.org <-- add your endorsement (by clicking "endorse" as 1st step)