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26. g5 
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This over advances the pawn and makes it weak. I think Rc1 to get the rook to an open file was necessary. | 
   
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26... Rd4 
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Attacking one of the weak points in white's position. I expect a sequence like:
27. Rb1 Rg4 
28. Kf3 Rxg5
29. Rc1 Rb5
30. Rc4 b6
31. axb6 Rxb6
and the white rook is tied to the defense of the b pawn. | 
   
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27. Rc1 
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Sacrificing the b pawn for rook activity. | 
   
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27... Rxb4 
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And I will not look a gift horse in the mouth. | 
   
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28. Rc7 
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Too little, too late. I will give up the b pawn since I can get both the g and a pawns for it. | 
   
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28... Rg4+ 29. Kf3 Rxg5 30. Rxb7 Rxa5 
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And now a 4 pawn advantage should lead to a resignation. | 
   
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31. h4 
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If he's not going to resign, he has to move something. | 
   
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31... h5 
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But now he is down to king and rook moves. And neither of them have anything productive to do. | 
   
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32. Kf4 Kg7 
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From here my king cannot be checked and protects the base of the pawn chain. White simply has nothing to do but shuffle pieces around, so he resigns. 0-1 | 
   
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