> But 50 percentage points of your "more than 50%" of games played are games where you exclusively use binary search

Although I think I get your point, saying 'You can't beat binary search in Guess Who' is misleading, considering you would probably describe yourself the optimal strategy as 'play binary search when ahead, when behind, don't'.

> Trying to get lucky means that you intentionally play badly in order to get more victories

That's quite an uncommon definition of good and bad.