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In chess, the Dragon Variation is one of the main lines of the Sicilian Defence and begins with the moves: :1. e4 c5 :2. Nf3 d6 :3. d4 cxd4 :4. Nxd4 Nf6 :5. Nc3 g6 In the Dragon, Black fianchettoes their bishop on the h8–a1 diagonal. The line is one of the sharpest variations of the Sicilian Defence, making it one of the sharpest of all chess openings. The modern form of the Dragon was originated by German master Louis Paulsen around 1880. It was played frequently by Henry Bird that decade, then received general acceptance around 1900 when played by Harry Nelson Pillsbury and other masters. The name "Dragon" was first coined by Russian chess master and amateur astronomer Fyodor Dus-Chotimirsky who noted the resemblance of Black's kingside pawn structure to the constellation Draco. ==Yugoslav Attack: 6.Be3 Bg7 7.f3 0-0 8.Qd2 Nc6 == The Yugoslav Attack is considered to be the main line that gives maximum chances for both sides, it continues: :6. Be3 Bg7 7. f3 The point of White's last move is to safeguard e4 and to stop Black from playing ...Ng4 harassing White's dark-squared bishop. Black cannot play 6.Be3 Ng4?? immediately because of 7.Bb5+ either winning a piece after 7...Bd7 as white can play Qxg4 due to the pin on the d7 bishop, or winning an exchange and pawn after 7...Nc6 8.Nxc6 bxc6 9.Bxc6 forking king and rook. :7... 0-0 8. Qd2 Nc6 and now there are fundamentally two distinct branches with 9. 0-0-0 leading to more positional play while 9. Bc4 leads to highly tactical double-edged positions. The Yugoslav Attack exemplifies the spirit of the Dragon with race-to-mate pawn storms on opposite sides of the board. White tries to break open the Black kingside and deliver mate down the h-file, while Black seeks counterplay on the queenside with sacrificial attacks. Typical White strategies are exchanging dark-squared bishops by Be3–h6, sacrificing material to open the h-file, and exploiting pressure on the a2–g8 diagonal and the weakness of the d5 square. Black will typically counterattack on the queenside, using the queenside pawns, rooks, and dark squared bishop. Black sometimes plays h5 (the Soltis Variation) to defend against White's kingside attack. Other typical themes for Black are exchanging White's light-square bishop by Nc6–e5–c4, pressure on the c-file, sacrificing the exchange on c3, advancing the b-pawn and pressure on the long diagonal. Black will generally omit ...a6 because White will generally win in a straight pawn attack since Black has given White a hook on g6 to attack. In general, White will avoid moving the pawns on a2/b2/c2, and so Black's pawn storm will nearly always be slower than White's on the kingside. Black can frequently obtain an acceptable endgame even after sacrificing the exchange because of White's h-pawn sacrifice and doubled pawns. 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「Sicilian Defence, Dragon Variation」の詳細全文を読む スポンサード リンク
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