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Mastermind (160)

Other names: Master Mind

Instruction:
Identify a secret code comprised of letters. Each row represents a guess at the secret code, whose correctness is described by black and/or white dots to the right. A black dot represents a letter in the guess that is in the same position as a letter in the secret code. A white dot represents a letter 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 FREED and the secret code was LEVEE, the puzzle would display 1 black and 1 white). Each letter in the secret code appears in at least one guess. Blank spaces can appear in the guesses but will never appear in the secret code.

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)
WPF Puzzle GP 2023 - Round 5 (209)
Child puzzles:
Mastermind Sudoku
Mastermind-Nurikabe-Yajilin
Wordle Bank
Related puzzles:
Kropki (Mastermind)
Wordle Bank