The 12 Preludios were written by Miguel Alcázar as the result of his first two trips to the Soviet Union. During the first trip, in November-December of 1983, he met Nikita Koshkin during the presentation of Alcázar's work at the Union of Composers in Moscow. A few days later, he promised to write something for him, as a way of commemorating the beginning of their friendship, if Alcázar would write also something for Koshkin. Both agreed upon this and when Alcázar went back to the Soviet Union, ...