Logic Masters Deutschland e.V.

This is a chaos construction rule-set I've been looking at recently. I'm not sure if it's been done before (most things usually have!) but I haven't seen it. I plan to make a small pack of puzzles using it, but here's one to kick things off. I expect it's around 4*, but we'll see what people think.

The Rules:

• Normal irregular Sudoku rules apply.
• Chaos construction: regions are to be determined, and must consist of a set of nine orthogonally connected cells, containing the digits 1-9 exactly once each.
• Dead ends: a cell containing a blue square is a dead end - a dead end in a region is a cell that is attached orthogonally to only one other cell in its region.
• Open ends: a cell containing an orange circle is an open end - an open end in a region is a cell that is attached orthogonally to more than two other cells in its region.
• Digits in a cell with an orange shape must be odd, and digits in a cell with a blue shape must be even.
• A digit in a cell with a small green circle counts the number of digits having the same parity (odd, even) as itself in the surrounding 3x3 area, including itself.
  Parity Party

  by Chilly

  

  Link for solving on SudokuPad