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1. d4 f5 2. Nf3 Nf6 3. e3 b6 4. Bd2 Bb7 5. Bd3 g6 6. O-O Nc6 7. h3 d6 8. Ng5
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? It is not clear what White is intending here (maybe next Kne6 Qd7, d5), but whatever it is only wastes time and brings him trouble... |

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8... Qd7
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Finishes Queen-side development, and allows Black to castle Queen side as well as covering e6 |

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9. b4
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To continue b5 no doubt, displacing Black's knight. Too slow...? |

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9... e5
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! Challenging for central control, and giving Black a good flight square for his knight on c6 |

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10. b5
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White's pawn on b5 cramps his white square bishop, a bonus for Black! What's more, Black will be able to offer his king excellent safety on the queen side just as soon as he can safely play a5(!) |

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10... Ne7 11. Qe2
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?! White needs a flight square for his knight on g5, other than f3. White should consider d4 or h4 instead |

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11... Bh6
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! White should have seen this coming, and played d4 or h4 in advance |

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12. Nf3 e4 13. Ne1 exd3 14. Qxd3 a5
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! An important insurance move for Black conceived on move 9, for upon b5-a6x Black's white square bishop threatens a nasty pin and Black has the a-file all to himself. Anything else, and Black can castle Queen side without ever having to worry about a pawn storm from White -- his pawn structure is impervious, and White's b-pawn is blocking a6 (even White's knights cannot land there). This move seems to guarantee Black's future. |

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15. Nc3 O-O-O 16. Qc4
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Winning some space, for Queen and knight |

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16... g5
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! Black is initiating a kingside attack. |

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17. Nd3 Bg7
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Clearing the way for Black's h-pawn |

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18. a4
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? Cramping White's position further! Qf7 might be tempting here, but it only brings about an exchange of queens. Such an exhange only favours Black here -- he now has the White squares all to himself. |

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18... h5 19. Qf7 Ned5
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! Forcing an exchange of queens, only good for Black here |

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20. Qxd7+ Rxd7 21. Rae1 Nxc3
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Exchanging favours Black, while opening the main white diagonal and freeing up e4 for a knight -- winning more material! |

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22. Bxc3 Ne4
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Gaining time and material for Black...! |

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23. Bxa5
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Any other move by the White bishop costs White's f-rook (for the Black knight) |

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23... bxa5 24. Kh1
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? For want of something to do? |

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24... g4
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! More pressure on White's vulnerable position... |

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25. Nf4 g3
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White cannot take the pawn on g3 on his next move |

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26. f3 Nd2 27. Rfg1 Nxf3
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! A useful sacrifice -- Black is cramping White's position, and will win plenty of time/material at the very least |

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