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The Ponziani Opening is a chess opening that begins with the moves: :1. e4 e5 :2. Nf3 Nc6 :3. c3 It is one of the oldest chess openings, having been discussed in the literature by 1497. It was advocated by Howard Staunton, generally considered the world's strongest player from 1843 to 1851, in his 1847 book ''The Chess-Player's Handbook''. For some decades, it was often called "Staunton's Opening" or the "English Knight's Game" as a result. Today, it is usually known by the name of Domenico Lorenzo Ponziani, whose main contribution to the opening was his introduction, in 1769, of the countergambit 3...f5!? The opening is now considered inferior to 3.Bb5, the Ruy Lopez, and 3.Bc4, the Italian Game, and is accordingly rarely seen today at any level of play. Black's main responses are 3...Nf6, leading to quiet play, and 3...d5, leading to sharp play. Ponziani's countergambit 3...f5!? was successfully played in the grandmaster game Hikaru Nakamura vs Julio Becerra Rivero, US Championship 2007.〔(Hikaru Nakamura vs. Julio J Becerra-Rivero, US Championship 2007 )ChessGames.com〕 ==History== The opening 1.e4 e5 2.Nf3 Nc6 3.c3 is one of the oldest known openings, having been discussed in chess literature by no later than 1497. It was mentioned in both of the earliest chess treatises: the ''Repetición de Amores y Arte de Ajedrez con ci Iuegos de Partido'' by Lucena and the Göttingen manuscript. Today the opening bears the surname of Domenico Lorenzo Ponziani. Although Ponziani did analyze the opening in 1769, his principal contribution was the introduction of the countergambit 3...f5!?〔Howard Staunton, ''The Chess-Player's Handbook'', Henry G. Bohn, 1847, p. 182.〕 Later the opening was favored by Howard Staunton, who in ''The Chess-Player's Handbook'' (1847) called it "so full of interest and variety, that its omission in many of the leading works on the game is truly unaccountable. ... it deserves, and, if we mistake not, will yet attain a higher place in the category of legitimate openings than has hitherto been assigned to it".〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ponziani Opening」の詳細全文を読む スポンサード リンク
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