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
Roderigo Lopez Roderigo Lopez Roderigo Lopez (also called Ruy Lopes, Ruy Lopez or Roger Lopez; c. 1517 – 7 June 1594) served as physician-in-chief to Queen Elizabeth I of England from 1581 until his death by execution, having been found guilty of plotting to poison her. A Portuguese "converso" or New Christian of Jewish ancestry, he is the only royal doctor in English history to have been executed, and may have inspired the character of Shylock in Shakespeare's "The Merchant of Venice", which was written within four years of his death. The son of a Portuguese royal physician of Jewish descent, Lopez