PAWN

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Pawn: This is the weakest soldier than all. This soldier only move to straight (only one square) and horizontal position (to eat enemy). But, it can "promotion" to all of the soldier if it reach the last square of enemy's place.

BISHOP

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Bishop: This soldier move with horizontal position but didn't like pawn, bishop can move to all squares with horizontal mode. It can be a dangerous soldier if you don't see its way.

KNIGHT

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Knight: This is the dangerous soldier after Queen and Rook. Its move like "L". It can make your King in "check" and you Queen is defeat because King is in "check" and Queen is in same position so, player must rescue the King and the Queen are defeat. 

ROOK

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Rook: The soldier that move in vertical position and move to all squares, and can make your King in "checkmate" situation. 

QUEEN

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Queen: This is the special soldier, it move in horizontal, vertical and to all squares. So, it can attack the enemy from anywhere.

KING

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King: Maybe its move is not dangerous and can't make problem, but this is soul of all. If the King is defeat so the player is lose. So, this is the key.