Logic Masters Deutschland e.V.

Normal Sudoku rules apply.

Poison: Green shaded cells are poison cells. The digit in a poison cell indicates the total amount of poison cells in the 3x3 square centred on that cell, including itself. For example, if r3c3 were a poison cell containing a 4, then 4 cells in columns 2-4 of rows 2-4 would be poison cells (r3c3, and 3 others). Not all shaded cells are given.

This puzzle is also available at f-puzzles and sudokupad.

This puzzle is based on the mechanics of Mosaic from Simon Tatham's Puzzle Collection.

I don't know if this rule as a Sudoku variant has a name - do tell me in the comments as I am very new to this setting lark!