The first diagram shows the basic checkmate position with a rook, which can occur on any edge of the board. The black king can be on any square on the edge of the board, the white king is in opposition to it, and the rook can check from any square on the rank or file (assuming that it can not be captured).
Why are vitamins necessary in diet? vitamins are essential in diet because they prevent diseases such as rickets,osteomalacia ,scurvy. vitamin d promotes absorption of calcium and phosphorus compounds from intesâ¦tines and enables the body to use these in formation of teeth and bones.
What you need, and how to get it. by Amanda Gardner. Vitamins and minerals are essential to any diet, and research suggests they may help prevent cancer and heart disease, not to mention other health problems.But reality check: Many studies have been conducted on vitamin-containing food, but not necessarily supplements.itamins and minerals are essential to any diet, and research suggests they may help prevent cancer and heart disease, not to mention other health problems.