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The Würzburger Trap is a chess opening trap in the Vienna Gambit. It was named around 1930 for German banker Max Würzburger. ==The trap== 1. e4 e5 2. Nc3 Nf6 3. f4 :White plays the Vienna Gambit. 3... d5 :Thought to be the best reply. 4. fxe5 Nxe4 5. d3 :White also has lines beginning 5.Qf3 (Steinitz) and 5.Nf3, but neither achieves an advantage.〔Horowitz (1964), pp. 221–22〕 5... Qh4+? :Initiating the trap. Black has other choices 5...Bb4 and 5...Nxc3.〔Korn (1982), p. 105〕 6. g3 Nxg3 7. Nf3 Qh5 8. Nxd5 Bg4 :8...Nxh1? 9.Nxc7+ Kd8 10.Nxa8 leads to advantage for White.〔 9. Nf4 :White can obtain the better game with 9.Bg2 Nxh1 (9...Bxf3 10.Qxf3 Qxe5+ 11.Kd1 Nxh1 12.Bf4 Qxb2 13.Qe4+ +− Hamann–Schvenkrantz, Germany 1965; 10...Qxf3 11.Bxf3 Nxa1 12.Nxc7+ Kd7 13.Nxa8 Bc5 14.Bxh1 Nc6 15.Bf4± Arhangel'skij–Popov, USSR 1958; Larsen) 10.Nxc7+ Kd7 (10...Kd8 11.Nxa8 Nc6 12.d4 Bxf3 13.Qxf3 Qxf3 14.Bxf3 Nxd4 15.Bg5+ Be7 16.Rd1+−; Larsen)〔 11.Nxa8 Nc6.〔〔Horowitz (1964), p. 222〕 9... Bxf3 10. Nxh5 Bxd1 11. hxg3 Bxc2? :Black tries to win a pawn, but instead loses a piece. 12. b3 (see diagram) :The black bishop on c2 is trapped; White will win it by playing Kd2 next turn. 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「Vienna Game, Würzburger Trap」の詳細全文を読む スポンサード リンク
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