Could just be you: Reference ranges are set for couch-potatoes and if you're a well-muscled man, you'll have creatinine high, often above the normal. And ranges are set arbitrarily to have a few percent of healthies outside on either end. Keep managing your hypertension and don't worry so much about creatinine.
A standard chess board has 64 individual squares, but 204 squares if you count squares of all sizes. A regulation board consists of eight squares in each direction.
Due to the 50-move rule, any 50-move subsequence of a given chess game will contain at least one capture or a pawn move. Since there are finitely many pieces on the board, and since pawns can move only finitely many times during a game, the number of moves in a chess game has a finite bound. Since in each move, there are only finitely many possibilities, the numbers of all games is finite.