The player decides to guess one of the numbers from three to six. According to the number of numbers decided by the player, the APP will randomly set a group of non-repeating numbers as the bottom of the puzzle, and the player will slide the number wheel to guess each number in the middle column. Each time a number is guessed, the APP will give a hint according to the number in the display area below, and the hint will be presented in the form of X+Y-. X means the number of correct numbers and positions, while Y means the number of correct numbers and incorrect positions.
For example, when a player guesses a four-digit number, when the answer is 1234 and the player guesses 1052, the number 1 is the correct number and position, while the number 2 is the correct number but not the correct position, so the APP will prompt 1+1-.