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29... Kg6 
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Not a very bright move. I certainly have to bring the king closer, but the f file has to be dealt with first. | 
   
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30. c3 Rgf8 
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Attaboy. Taking control of the open file, this is obviously the best and most solid move. | 
   
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31. Rd2 Rf4f1+ 
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Forcing another exchange | 
   
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32. Rxf1 Rxf1+ 
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Another step closer to victory | 
   
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33. Kc2 Kf5 
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In the endgame, the king is an important weapon | 
   
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34. Re2 
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He threatens Re5 , but it's not very bad for me | 
   
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34... h5 
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Since I have a kingside majority, I'd better push those pawns | 
   
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35. b4 
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Seeking counterplay on the queenside | 
   
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35... h4 
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Keep on pushing the pawns | 
   
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36. a4 
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Likewise | 
   
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36... g4 
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Hmmm, advanced pawns in the endgame... | 
   
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37. a5 g3 
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At this point, Fritz gives a -  evaluation, meaning basically "a decisive advantage". I threaten Rf2, exchanging the last pair of rooks, and entering a won (really won) endgame | 
   
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38. Kd2 Rf2 
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Ha! | 
   
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39. Ke3 Rxe2+ 
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Another step closer to the victory, I can smell it. Or perhaps I'm just tired | 
   
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40. Kxe2 Ke4 
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A very solid place for my king, surveying both my kingside pawns and his vulnerable queenside ones | 
   
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41. b5 
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This is a non-losing move, but these kind of moves are in short supply now for white. | 
   
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41... b6 
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I don't want to move the king, it stands very well on e4 and we'll soon see why. | 
   
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42. axb6 axb6 
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Well, he is in zugzwang now. If he quits guarding d3, my king will enter and pick up all his pawns | 
   
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43. Kd2 
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The only move still guarding d3, but I have a neat move prepared (pretty obvious, actually, but still neat). Told you he was in zugzwang | 
   
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43... h3 
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With promotion to follow in 2 moves, white resigned.
So, how do you win a "won game"? In this case, make fewer mistakes and be a bit more careful than the opponent. | 
   
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