In Paris, the Exposition Universelle of 1889 has opened its doors. Close to the Eiffel Tower, which has just been inaugurated, people are gathering in the gallery of machines: Professor Barnabé Barberac is going to present his new invention ... Challenge the Professor, defeat his machine with the speed of your thinking and your mental mathematics skills! Compete against other players in battles of calculation!
Combo found, one of the slots of the adversary has been blocked