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 | | The first moves of a chess game are the " opening moves," collectively referred to as " the opening." Recognized sequences of opening moves are referred to as openings or defenses, and have been given names such as the Ruy Lopez, Sicilian Defense, and Queen's Gambit Declined. |
 | | The Queen's Knight Defense is an uncommon opening that often transposes to the Nimzowitsch Defense after 1.d4 Nc6 2.e4 or the Chigorin Defense after 2.c4 d5, although it can lead to unique lines, for example after 1.d4 Nc6 2.d5 or 2.c4 e5. |
 | | If White opens with 1.Nf3, the game often becomes one of the d4 openings (closed games or Indian systems) by a different move order (this is called transposition), but unique openings such as the Réti and King's Indian Attack are also common. |
| www.warsaw-hotel.info /poland-guide/Chess_opening (4532 words) |