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Alekhine's Defence is a hypermodern chess opening that can begin with the moves: :1. e4 Nf6 Black tempts White's pawns forward to form a broad pawn centre, with plans to undermine and attack the white structure later in the spirit of hypermodern defence. White's imposing mass of pawns in the centre often includes pawns on c4, d4, e5, and f4. Grandmaster Nick de Firmian observes of Alekhine's Defence in MCO-15 (2008), "The game immediately loses any sense of symmetry or balance, which makes the opening a good choice for aggressive fighting players."〔Nick de Firmian, ''Modern Chess Openings, Fifteenth Edition'', 2008, p. 159. ISBN 978-0-8129-3682-7.〕 The ''Encyclopaedia of Chess Openings'' (ECO) has four codes for Alekhine's Defence, B02 through B05: *B02: 1.e4 Nf6 *B03: 1.e4 Nf6 2.e5 Nd5 3.d4 (including the Exchange Variation and Four Pawns Attack) *B04: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 (Modern Variation without 4...Bg4) *B05: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 (Modern Variation with 4...Bg4) ==History== The opening is named after Alexander Alekhine, who introduced it in the Budapest tournament in games against Endre Steiner〔(Endre Steiner vs Alexander Alekhine ) at ChessGames.com〕 and Fritz Sämisch.〔(Friedrich Samisch vs Alexander Alekhine ) at ChessGames.com〕 Four years later, the editors of the Fourth Edition of ''Modern Chess Openings'' (MCO-4) wrote: Nothing is more indicative of the iconoclastic conceptions of the 'hypermodern school' than the bizarre defence introduced by Alekhine ... . Although opposing to all tenets of the classical school, Black allows his King's Knight to be driven about the board in the early stages of the game, in the expectation of provoking a weakness in White's centre pawns.〔R.C. Griffith and M.E. Goldstein, ''Modern Chess Openings, Fourth Edition'', 1925, p. 1.〕 In addition to Alekhine, another early exponent of the defence was Ernst Grünfeld. 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「Alekhine's Defence」の詳細全文を読む スポンサード リンク
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