The computer has picked a secret number made of all different digits. Enter a guess and you'll learn how many "strikes" (right digit, right position) and "balls" (right digit, wrong position) you got. Gather the clues and narrow it down logically!
A strike is a digit that's both correct and in the right position; a ball is a digit that's in the secret number but in the wrong position. If nothing matches at all, that's an out. Get all strikes equal to the number of digits, and you win!
This is a number-deduction game that borrows baseball's strike/ball/out terminology. Since the computer's secret number is always made of non-repeating digits, the clues you get from each guess quickly narrow down the possibilities.
Start by entering any guess with all different digits, just to see which digits are actually included. Then compare the strike and ball counts as you nail down each position one at a time — that gets you to the answer much faster. Jotting the clues down on paper makes it easier to keep track of the possibilities.