In 1574–75 he lost the first known international Chess Tournament, which was held, at the invitation of King Philip II of Spain, at the Royal Court of Spain in El Escorial, close to Madrid, to Leonardo di Bona, a Calabrian lawyer, and to Paolo Boi, but placing ahead of 4th (and last) place finisher Alfonso Ceron .
Alfonso XIII of Spain | Alfonso X of Castile | Alfonso Cuarón | Alfonso VIII of Castile | Alfonso V of Aragon | Alfonso I d'Este | Alfonso XI of Castile | Alfonso XII of Spain | Alfonso Herrera | Juan Pablo Pérez Alfonso | Alfonso II of Aragon | Alfonso XII | Alfonso III of Asturias | Alfonso I d'Este, Duke of Ferrara | Alfonso d'Este | Alfonso | Giovanni Alfonso Borelli | Alfonso Sastre | Alfonso Reyes | Alfonso Mora | Alfonso Fadrique | Alfonso Bonilla Aragón International Airport | Alfonso Arau | Alfonso A. Ossorio | Kristian Alfonso | Civil Order of Alfonso X, the Wise | Alfonso Romo | Alfonso Ribeiro | Alfonso Parot | Alfonso Martínez (taekwondo) |