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17... Nb4
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White has to be on guard for a Nc2-d4 maneuver in the endgame. |

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18. Ne1
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Probably planning to exchange the knight on b4, however, Black decides to open a second front on White's king, while the defenders are disorganized. |

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18... Ng4 19. f3 Qg5
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The knight on d2 is hanging, and after 20. fxg4 Qxd2 21. Rd1 Qg5 22. h3 h5, Black's attack looks strong. |

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20. Rxa8 Rxa8
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Occupying an open file with the Rook, however, Fritz informed me after the game, that I missed 20...Qxd2 21. Rxf8 Kxf8 now white has to play 22. fxg4 and let the rook hang, as mate on h2 is being threatened. Black will then pick up the pawn on g4 with a winning endgame. |

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21. Qc3 Nf6
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In retrospect, 21...Nh6 might have been better, giving me the option of playing a quick f5. |

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22. Rd1 Ra2
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That tasty, tasty 7th rank. |

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23. Nd3
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Attempting to exchange the b4 knight, but he has overlooked a tactic. |

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23... Qe3+
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Crushing!!! |

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24. Kg2
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Why not 24. Kh1? Because of 24...Bg4 when 25. fxg4 leads to mate after 25...Nxe4 26. Nxe4 Qxe4 27. Kg1 Qf3 and White can resign. |

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24... Bg4
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The same idea applies. Exploiting the pin on the d2 knight will prove decisive. Really not a difficult move to find, especially if you have read David LeMoir's book "How to Become a Deadly Chess Tactician," which is filled with examples of passive sacrifices. |

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25. fxg4 Nxe4 26. Qc1
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White is up a piece, but not for long. |

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26... Nxd3 27. Bxd3 Qxd3
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Now another piece drops and with it the game. |

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