This competition is called "Padlocked"
Each of you has a padlock. Everyone will have a different four digit number they will have to solve. You will guess a four digit number, and i will tell you how many correct digits you have, and how many correct placements you have.
The person to solve their combination first wins
Everyone will have different combinations.
Everyone will be doing this here, i will answer your combination in the order that you guess. You can only guess one combination at a time.