Frenemies -- The Pieces

White areas in the grids below are undefended. Light sand colored squares are being defended by the piece shown.

For each puzzle, you may have one or more of the following pieces available:

R -- Rook		The ROOK can defend an entire row and column -- even a very long row. This is like chess.
B -- Bishop		The BISHOP can defend on 2 diagonals -- even a very long distance. This is like chess.
S -- Seahorse		The SEAHORSE can defend squares that are 1-straight step + 1-diagonal step away. The SEAHORSE can NOT defend longer distances. This is like chess.
C -- Crab		The CRAB can defend a 3x3 area right around the CRAB. This is NOT like chess.
X -- Sand Cube		The SANDCUBE can block a single square. This is NOT like chess.

You can learn the pieces as you play the game because you can always clear the board and retry.