During the early 1950s, it was contested by many of the world's leading golfers, with winners including Bobby Locke and Bernard Hunt. In 2009, the tournament once again attracted an international field including eight time European Tour Order of Merit winner and captain of the 2010 European Ryder Cup team Colin Montgomerie. During the event, it was announced that a deal had been signed which would see the Egyptian Open become an event on the second tier Challenge Tour for a minimum of three years from 2010. The Challenge Tour last visited Egypt in 2004 for the Al Ahram-Jolie Ville Sharm El Sheikh Challenge. Emery d'Amboise  Emery d'Amboise (1434 – 13 November 1512) was Grand Master of the Knights Hospitaller from 1503 to 1512. He was the 41st Grand Master. He succeeded to Pierre d'Aubusson. Emery d'Amboise was born in 1434 in the castle of Chaumont-sur-Loire, a stronghold of the powerful family of Amboise. He was the third son of Pierre d'Amboise (1408–1473), chamberlain of Charles VII and Louis XII and Anne of Bueil (1405–1458), daughter of Jean IV Bueil. His younger brother, George, was the future Cardinal d'Amboise, prime minister of Louis XII. Subalternation  Subalternation is an immediate inference which is only made between A (All S are P) and I (Some S are P) categorical propositions and between E (No S are P or originally, No S is P ) and O (Some S are not P or originally, Not every S is P) categorical propositions of the traditional square of opposition and the original square of opposition. If the A proposition is true we may immediately infer that I is true. If the E proposition is true we may immediately infer that O is true. Conversely, If the I is false, we can immediately infer that A is also false, as well as if O is false, then E is false. However, if the A proposition is false that will not tell us anything about the truth value of the I proposition. Similarly, if the E proposition is false, that will not tell us anything about the truth value of the O proposition. An example of a subalternation is "If all leopards are mammals, then some leopards are mammals." When the inference is misapplied, the syllogistic fallacy is called an illicit subalternation.