This workshop has been based on the work my students and myself have made during the school year 2011-2012 and we have presented at the « Mathematical Games’ Corner » of the Third Edition of the Scientific Communication Festival « Scienza under 18 » that took place in May 2012 in Monfalcone (Italy). We played with other students and the general public a new game which was born during the work on original sources examined during some extra-curricular workshops on History of Maths. The participants were all volunteer students (aged from 15 to 18 years) frequenting the ISIS « D’Annunzio-Fabiani » in Gorizia, coming from the linguistic, scientific and artistic sections of our Institute. During the workshop in Copenhagen we have played the difficult version of the game and we have examined the pages of Euler’s Algebra we had taken into account. Then we have discussed about the transposition of original sources in a game as well as the value of social games in increasing of students’ motivation in the learning of mathematics.