Chess opening - Wikipedia
https://en.wikipedia.org/wiki/Chess_opening
OverviewClassification of chess openingsAims of the openingOpening repertoiresOpening nomenclatureSee alsoFurther readingChess openings are primarily categorized by move sequences. In the initial position, White has twenty legal moves. Of these, 1.e4, 1.d4, 1.Nf3, and 1.c4 are by far the most popular as these moves do the most to promote rapid development and control of the center. A few other opening moves are considered reasonable but less consistent with opening principles than the four most popular moves. The Dunst Opening, 1.Nc3, develops a knight to a good square, but is somewha…
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