Sunday Stumper: Killer Sudoku by Prasanna Seshadri - The Art of Puzzles

This tough Killer Sudoku is based off the twelve pentominoes (with an extra Y clue). Can you solve the challenge from Prasanna Seshadri?

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Sunday Stumper: Killer Sudoku by Prasanna Seshadri - The Art of

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Prasanna Seshadri, Author at The Art of Puzzles