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Mastermind (160)

Instruction:
Each row represents a guess at a secret code. A black dot represents a digit in the guess that is in the same position as a digit in the secret code. A white dot represents a digit in the guess that is in the secret code, but not in the same position. The dots are given in no specific order, and each letter in the secret code contributes at most one dot with black dots given priority over white dots in case of ambiguity (for example, if the guess was 12334 and the codeword was 53363, the puzzle would display 1 black and 1 white). Each digit in the secret code appears in at least one guess.

Reference: WPF (1)

Examples:
WPF Puzzle GP 2016 - Round 2 Casual (77)
WPF Puzzle GP 2016 - Round 3 Casual (75)
WPF Puzzle GP 2016 - Round 4 Casual (74)
WPF Puzzle GP 2017 - Round 5C (16)
WPF Puzzle GP 2017 - Round 7C (12)
WPF Puzzle GP 2017 - Round 8C (50)
Child puzzles:
Mastermind Sudoku
Mastermind-Nurikabe-Yajilin