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17... Na2+ 18. Kb2 Nb4
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White examines the squares available to the black knight and realizes it is like a Monty Python character, about to lose its last remaining leg. Though Nd3+ is a trade, white picks off another pawn in the process. |

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19. c3 f6
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Right. Counter threat. White, up 3, likes fair trades. |

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20. cxb4 fxe5 21. dxe5
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…and ends up a pawn ahead anyway. Like e4, this pawn never moves again. |

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21... Bg4
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White cannot interpose the pawn without the bishop forking rooks. |
2 comments
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22. Rd5
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Here white can defend e5 while moving ahead of the row 4 pawn line, ready to attack black’s broken and scattered ranks. Rd7 was right out of the question, as well as most other spots on the d file. While black can play Be6, Rc5 is a satisfactory response. |

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22... Ke7 23. Kc3 Rf8 24. h3
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White should probably have played Rf1 instead, or Rd2. |

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24... Be6 25. Rc5 Rxf2 26. Rxc7+ Kd8 27. Rxh7 Rxg2 28. Rf1 Rg8 29. Rxh5 Kd7 30. Rh7+
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White recognizes black can assault the h pawn with a bishop/rook tag team, but thinks the bishop might be vulnerable. |

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30... Kc6 31. Rf6
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The black king cannot protect the bishop, so the rook must serve as sentry. |

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31... Re8
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White’s thought is maybe the king should move in. |

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32. Kd4 Kb6
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Black should probably have sacrificed the e pawn, drawing the king away. Mate was maybe 17 moves away, but now is six.
33. c5+, Kc6 34. Rxe6+ Rxe6 35. Kc4. Re7. 36. Rxe7 e3. 37. b5+ axb5+. 38. axb5#.
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33. Rhh6
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Blunder. Black failed to see it, despite playing close with the analysis tool.
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33... Kc7 34. Rfxe6 Rxe6 35. Rxe6 Kd7 36. Rd6+ Ke7
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While it might be marginally quicker to promote a pawn, white just wants to finish with the king and rook, and can’t let the passed pawn live any longer. |

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37. Kxe4 Kf7 38. Kf5 Kg7
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