c-file

Black would have loved to open the c-file and this is the first step.

Lubomir Kavalek: Chess Champ Kamsky Marches On Lubomir Kavalek 2011

Bd3 Qc8 30.a3 Rhc6! black finishes the game triumphantly on the c-file.

Lubomir Kavalek: Chess Champ Kamsky Marches On Lubomir Kavalek 2011

Earlier, Kamsky could have played the combination Nxa2+/Qxa2 Nxe3, but opening the c-file has a devastating effect on the white king.

Lubomir Kavalek: Chess Champ Kamsky Marches On Lubomir Kavalek 2011

It opens the c-file and vacates the square d4 for the knight, using it as a trampoline to jump to e6.

Lubomir Kavalek: Steinitz's Immortal Chess Game 2010

Therefore, it would mean loss of time if the Queen's Knight were developed into the c-file before the c-Pawn has moved; the Knight would have to be moved away again in order to enable the opening of the c-file.

Chess and Checkers : the Way to Mastership Edward Lasker 1933

Black's last move clearly indicates that he intends playing P-e5 and not P-d5, and so White has no reason to expect that he will be able to open the c-file for his Rooks.

Chess and Checkers : the Way to Mastership Edward Lasker 1933

Ra1-d1 comes also into consideration but this Rook might be needed later on the c-file while the King's

Chess and Checkers : the Way to Mastership Edward Lasker 1933

In Queen's Pawn openings the move B-g5 is always good as Black cannot very well castle on the Queen's side on account of the open c-file in which White would soon obtain an overwhelming attack.

Chess and Checkers : the Way to Mastership Edward Lasker 1933

Knight is best placed in the c-file because on the edge of the board, in the a-file, he has less mobility; less squares are accessible to him.

Chess and Checkers : the Way to Mastership Edward Lasker 1933

In my next moves I want to exchange knights on d5 to open the c-file.

United States Chess Federation 2009