The computer has chosen a 4 digit number
You must find out what number was chosen
Start the game by typing a random guess using the number buttons on screen
The computer will then provide clues based on your guess
The clues are in the form of a symbol code
  A digit is correct and the digit is in the correct position.
  A digit is in the answer but the digit is in the wrong position.
  A digit is wrong - it is not in the answer.
Although each of the clues relate to a digit, none of the clues indicate which of the digits they are referring to
Use the clues to improve your guess and you will gradually identify the correct number.