The very first idea for the piece was generated by the game “Mined field” (see the on-line rules on the computer to understand what follows) which is usually installed with FreeCell, Hearts and other games in the Windows directory called “games”. The observation of the casual distribution of mines and relative numbers (indispensable to the player for the individuation of the mines) pulled us to assign a musical component to every element in the field. So we built a square of 7 x 7 cells where we disposed 49 strings. We overlapped it to many bigger mined fields (9 x 9 with 10 mines) in order to have, at any new game, a different quantity of mines and numbers falling inside the 7 x 7 square. Only numbers 1, 2 and 3 were considered (we discarded the rarer number 4, sometimes present in the field because of the setting mentioned above). This was due to a chosen economy of means. To be honest, this kind of procedure is peculiar of the music starting from I and ending in O (included). So, part of the subtitle of the piece is to be referred to this section.