Since the early 21st century, the consensus among specialized historians is that the birth of modern chess took place in the ancient Kingdom of Valencia. Francesc Vicent was the author of the first known treatise on modern chess, the ‘Llibre dels jochs partits dels scachs en nombre de 100’, printed in Valencia on May 15, 1495. In an article for ‘Peón de Rey’ Magazine, Sergi Núñez and Francisco Rubio explain why a line in the Scandinavian Opening should be named ‘the Valencia variation’.