Two major pieces (queens or rooks) can easily force checkmate on the edge of the board. The process is to put the two pieces on adjacent ranks or files and gradually force the king to the side of the board, where one piece keeps the king on the edge of the board while the other delivers checkmate.
Urine is mostly water (about 95% water), however, the rest of the contents of urine can vary depending of what youâve eaten, drank, breathed or been exposed to. The remainder of urine usually consists of urea, uric acid, ammonia, hormones, dead blood cells, proteins, salts and minerals, and toxins.
Quick Facts. 1  Kidney stones are made of salts and minerals in the urine that stick together to form small pebbles.. They can be as small as grains of sand or as large as golf balls. 2  There are different types of kidney stones. Most stones are a combination of calcium and oxalate.