getPiece(int, int)) and "black player winner" (in getWinner()).BreakthroughState class.getPiece(int, int)) and "no winner" (in getWinner()).BreakthroughState object, return the String that represents the current game state.String in the format "[a-h][1-8]-[a-h][1-8]", return an int array with the 0-based
row moved from, column moved from, row moved to, and column moved to.getPiece(int, int)) and "white player winner" (in getWinner()).