Outposts

Weak square in our opponent's position offers an ideal place to put our pieces. If we have secure control of such a square (preferably by means of a pawn), we can post a piece on it. Minor pieces (especially knights) are best suited to that task. From this outpost we can attack other points in our opponent's set-up. 
The most valuable squares for outposts lie deep in the opposing half of the board.

Something must be done immediately against minor pieces on the 6th/3rd rank, or else they will be supported by other pieces. It is only in rare cases that such pieces can be left alone and that we can work around them. A standard solution is the sacrifice of the exchange for a pawn.

Although a minor piece is well placed on an outpost, it sometimes blocks an open file and thus gets in the way of the major pieces. So you should not be afraid to move it away and then back or simply to move it off that square.

Thanks I have a good lesson!