Complex sentence: The canonical Kakuro puzzle is played in a grid of filled and empty cells-- "black" and "white", respectively--usually 16 × 16 in size, but these dimensions can vary widely.
Split into simpler sentences: The canonical Kakuro puzzle is played in a grid of filled and empty cells, "black" and "white" respectively. Puzzles are usually 16 × 16 in size, but these dimensions can vary widely.