A file on which there is no pawn to obstruct a rook which therefore can control the whole file. The white rook is controlling the open E-file.
ECHESSPEDIA
Quotes of the Day
I am a totally normal guy. My father is considerably more intelligent than I am.
Magnus Carlsen 2010
Of chess it has been said that life is not long enough for it, but that is the fault of life, not chess.
Irving Chernev
It is not possible to become a great player without having learned how to analyse deeply and accurately.
Mark Dvoretsky
This one hour allows me to put the problem into the background and then, when I come back, I am much more rational and less emotional about the particular problem and I can think better about it.
G. Borg 2016
The Golden Age, when machines were weak and my hair was strong!
Garry Kasparov 2017