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17. Kh2 Nb4
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Threatening to capture on d3, forking Queen, Rook, and Bishop |

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18. Nfe5
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This is a mistake. Better was Qd2, followed by Ba3 to exchange the bad bishop for the good knight. |

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18... Qc7 19. Qf4
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Now White loses the exchange. |

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19... Nc2 20. Rac1 Nxe1 21. Rxe1
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Black is up the exchange, but has no open files for his rooks. |

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21... a6
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Threatening to boot the knight with ... b5 |

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22. a5
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Clamping down on the queenside, and giving the knight an outpost on b6 |

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22... Bg6
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Offering an exchange |

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23. Bc1
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White will reroute the bishop to d2, where it protects the weak a5 pawn. |

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23... Nh5 24. Qg4
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Now ... Rxe5?? loses after 25. Nxe5 Qxe5 26. Qxc8 |

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24... Rcd8
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Black could of course draw with ... Nf6 25. Qf4 Nh5 26. Qg4 Nf6 27. Qf4 Nh5 etc. |

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25. f4
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Reinforcing the knight on e5 |

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25... Nf6 26. Qf3 h6
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Forced, against the threat of f5 (after which ... Rxe5 loses to Bf4) |

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27. Nxg6
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Crippling the Black pawn structure, and opening up a diagonal to the Black King |

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27... fxg6 28. Bd2 Nd7
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The knight was fine on f6, from where it could jump to d5 in case White's e4-pawn advances. |

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29. e5
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Now the knight can't return to f6 and White has opened a light-square path to the Black king. |

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29... Rdb8
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Protecting b7, which is immune anyways, because of 30. Qxb7 Qxb7 31. Bxb7 Rb8 32. Bxa6 Rxb3 33. Nb6 (to prevent ... Ra8 trapping the bishop) Nxb6 34. axb6 Rxb6 with advantage to Black |

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30. Qg4
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30. Qd5+ Kh7 31. Qf7 Re7 is no good. |

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30... g5
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Here, White can play 31. Bd5+ Kh8 32. Qf5 followed by Be4, threatening mate on h7 |

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31. e6
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This pawn thrust isn't best (see comment to previous move) and it also allows ... Nf6. |

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31... Nf6 32. Qf5
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The only square |

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