The ornamental design for a rookchesspiece, as shown and described.
FIG. 1 is a front elevational view of a rook chess piece showing my new
design;
FIG. 2 is a top plan view thereof; and
FIG. 3 is a perspective view thereof.
The side views of the rook chess piece are identical to its front view
shown in FIG. 1.
The characteristic feature of my design resides in the elliptical,
disintegrating edges intersecting to form four interior curved surfaces
which are visible through the apertures of the chess piece. A similar
design is visible on the ceiling of the chess piece cavity when one looks
upwardly through the apertures.