At the start of a match, how many different types of chessmen are found on the board?

King - Moves one square in any direction.
Queen - Moves any number of squares diagonally, horizontally, or vertically.
Rook - Moves any number of squares horizontally or vertically.
Bishop - Moves any number of squares diagonally.
Knight - Moves in an ‘L-shape,’ two squares in a straight direction, and then one square perpendicular to that.
Pawn - Moves one square forward, but on its first move, it can move two squares forward. It captures diagonally one square forward.