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Theme: Paired Clues (Written for 2015 Puzzle Grand Prix Finals but not used)

Author/Opus: This is the 230th puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Place the ten indicated tetrominoes into the grid, rotations and reflections allowed. Tetrominoes cannot cover the numbered cells, and tetrominoes cannot be placed in adjacent cells that share an edge or corner. Numbered cells indicate how many of the surrounding cells (including diagonally adjacent cells) contain parts of tetrominoes.

Answer String: Enter the length in cells of each of the shaded segments from left to right for the marked rows, starting at the top. Separate each row’s entry from the next with a comma.

Time Standards (highlight to view): Grandmaster = 4:00, Master = 7:30, Expert = 15:00

Solution: PDF