(1) Pawn and move. (When a Pawn is conceded the KBP is understood unless another is specified.) The player giving the odds takes his KBP off the board and his adversary has the first move.
(2) Pawn and two moves. The player giving the odds takes off his KBP as before and his opponent has the first two successive moves.
(3) Knight.
(4) Rook.
(5) Two minor Pieces.
(6) Queen.
Open File. A file having all of its squares unoccupied.
Open Game. A game in which the development of the Pieces is accomplished in advance of the Pawns. Moving the KP to K4 as a first move on both sides generally leads to an open game, but open games depend upon the positions resulting from the openings, irrespective of the first moves.
Openings. The first few moves in a game, or those by which the Pieces and
