"I have him right where I want him! What do I do now?"
what do i have to do once achieve positional advantage??
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@estragon : actually there is a knight on d7 ( sry i forgot to put it ) , so if the position is like this, then what should i do??
firebrandx : thks~!! 
this is a game of mine
what do i have to do now after seizing that d5 central square?? often after i achieve my positional aim ( e.g get an central outpost for my knight ) , then i dont know how to convert the advantage into a win then end up in a draw...
any advice??
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EDIT ( lol sry, actually there is a knight on d7 )