Sicilian Defence, Chekhover Variation Sicilian Defence, Chekhover Variation The Sicilian Defence, Chekhover Variation (also sometimes called the Szily Variation or Hungarian Variation) is a chess opening named after Vitaly Chekhover, from the game Chekhover–Lisitsin, Leningrad 1938. It is defined by the moves: On move four White ignores the standard opening principle to not develop the queen too early in the game. Although the Chekhover Variation is somewhat rare at grandmaster level, it is not uncommon among amateurs. The "Encyclopaedia of Chess Openings" (ECO) assigns code B53 to this opening. Black's main response to the Chekhover Variation is 4... Nc6 immediately attacking White's queen, leading
Ruy Pérez Ponce de León was there given eventual lordship over the city after its conquest from the Moors. Ruy died in 1295, two days after being injured in the Battle of Iznalloz against the forces of the Kingdom of Granada under Muhammad II, in a small town of the same name north of Granada. Ruy Pérez Ponce de León Ruy Pérez Ponce de León or Rodrigo Pérez Ponce de León (b. ? - d. 1295) was a Spanish noble of the House of Ponce de León, in the service of the Kingdom of Castile. He was the 15th Grand Master of the Order of