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25. h4
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The last chance was 25. Re7, but black's plan would've been the same. |

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25... Ne2+
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The knight and f-pawn combine to trap the king on the h-file. |

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26. Kh1
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Notice the mating pattern. If white's h-pawns were removed Rh8 would be mate. So, black goes after the h-pawns. |

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26... Rf4 27. d5
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Preserving a pawn, that black had no interest in. |

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27... Rxh4
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The threat is now mate in two. |

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28. Red1
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28. Rxe2 was mandatory, but hopeless. |

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28... Rxh2+
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0-1. 29. Kxh2 Rh8#. White got into serious difficulty by intiating tactical operations in the center, prior to castling. Black always had defensive resources based on exploiting the white king position. A miscalculation by white left him a piece down, which is a serious material deficit. |

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