Logic Masters Deutschland e.V.

Decompression, by James Sinclair

The grid contains one or more 3x3 square boxes, which must be located. Each box contains the digits 1-9 once each, and digits cannot repeat in a row or column. Boxes may partially overlap, but no two boxes can entirely overlap, and no one cell can be in more than three boxes. Cells that are not in a box do not contain digits.

A cell's value is equal to its digit multiplied by the number of boxes in which it appears. A cell without a digit does not have a value (i.e. it is ignored for the purpose of the clues defined below).

Clues outside the grid give the sum of all values in the indicated direction.

Line clues and the cells on the inequality sign do not necessarily contain digits; if they do, the following rules apply:
Values along purple lines do not repeat, and are a set of consecutive numbers that can appear in any order.
Values along gold lines do not repeat, and no two values on the same line can be consecutive.
The inequality sign points toward the cell with the smaller value.

SudokuPad

This was my entry for Turn 6 of The Skunkworks League, where the prompt was to make a 9x9 puzzle using exactly six numbers (3, 6, 17, 17, 34, 45) as clues. Could I have improved on it now that I'm free to use any clues I want? Maybe! But I'm pretty happy with how everything fits together, so I just thought I'd put it out as-is.

Also, apologies to ThePedallingPianist, who published a puzzle with the same title (and a somewhat similar ruleset) earlier this year. Not trying to be unoriginal, but the portmanteau of deconstruction and compression is more fitting than anything else I could think of.

If you want more of my puzzles, check out Artisanal Sudoku, where I publish an approachable set of variant sudokus every week :)