Patchwork Pentominoes

by Blobz by Blobz

CASE 3182

Patchwork Pentominoes

Not graded yet

The brief

Normal sudoku rules apply.

The indicated 60-cell white region contains one each of the twelve standard pentominoes (no repeats by rotation or reflection).

Each "difference" dot lies on the boundary between two pentominoes. Digits separated by these dots differ by the amount shown. Every pair of touching pentominoes shares exactly one such dot.

The arrangement of pentominoes must be deduced.

Once placed, each pentomino behaves like a 5-cell killer cage: digits do not repeat and must sum to the value listed in one of the pentomino's cells.

Illustrated Pentominoes at: https://tinyurl.com/pent-labels

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