Mini Code Breaking

Game play：
Player A sets the password, and Player B deduces the answer.
Toy B first guesses four colors randomly. Player A prompts whether the answer is correct or not according to the nail of Toy B.
Specific rules: the color is correct, the position is incorrect, check the white nail, and insert the red nail in the correct color and position.

Configuration: Abacus Magical Calculation Kit with storage cover, 60 coded chess pieces in 6 colors, 15 red indicating chess pieces, 15 white indicating chess pieces and instructions.