Introduction to Chess Board..!!

To describe the events on the Chessboard briefly a name has been given to every one of the 64 squares. The eight lines, running upwards, are successively designated by the numbers 1, 2, 3, 4, 5, 6, 7, 8, and the eight rows running from left to right, are successively designated by the letters a, b, c, d, e, f, g, h. For pawns they can only capture a piece that is placed diagonally in front of them. Also, on its initial move, a pawn can move up two squares instead of just one. However, there is a special case for this - if an enemy pawn is captured in one move instead of two, that move can be later used to capture the enemy.