Changes

[https://en.wikipedia.org/wiki/Aron_Nimzowitsch Nimzowitsch] defined outposts as [[Squares|squares]] on a [[Half-open fileFile|half-open file]] on the opponent's half of the board, defended by own pawns. The logic between such a placement was to entice the opponent to attack such a piece by a pawn, thereby weakening the pawn standing on that half-open file. In [https://en.wikipedia.org/wiki/Mein_System My System] knight and [[Rook|rook]] outposts were mentioned - the former occurred in the [[Center|center]], the latter - on the wing. One game commentary mentions also "a diagonal outpost", though this subject is not expanded.

* [http://www.chess.com/article/view/an-outpost An Outpost] by [http://www.chess.com/members/view/energia Iryna Zenyuk], July 16, 2009, [http://www.chess.com/ [Chess.com]], July 16, 2009