Ruy Lopez that after the common retreat 4.Ba4, Black will have the possibility of breaking a future pin on his by playing ...b5. White must take some care not to fall into the Ruy Lopez, Noah's Ark Trap, in which Black traps White's on the b3-square with a ...a6, ...b5, and ...c4 pawn advance on the . Ercole del Rio, in his 1750 treatise "Sopra il giuoco degli Scacchi, Osservazioni pratiche dell'anonimo Modenese" (On the game of Chess, practical Observations by an anonymous Modenese), was the first author to mention 3...a6. However, the move became popular after it was played by Paul
Ruy Diaz Melgarejo known as the "Invincible Captan." Ruy Diaz Melgarejo Ruy Diaz Melgarejo (Salteras 1519 – Santa Fe 1602) was a miner, military, conqueror and statesman who established the Spanish Crown in the region of Río de la Plata in South America. His life was marked by wars, conspiracies, persecutions and family conflicts. Melgarejo enjoyed the favor of the Spanish crown. He almost absolutely ruled the independent province of Guayrá for 30 years. Melgarejo left Italy on November 1, 1540, on an expedition led by Álvar Núñez Cabeza de Vaca to Río de la Plata. He remained with de Vaca until, in