Logic Masters Deutschland e.V.

A project that follows right after the previous two YinYang hybrid puzzles of mine.


An even bigger version will come out soon after this but for now, here's the smaller one that showcases a few particular types of deduction that I implemented with this rule set combo.



Rules:

- Shade some cells in the entire grid so that all of the unshaded cells together form an orthogonally connected area, while each group of the shaded cells has to connect to the grid's perimeter.

- In addition, divide the entire grid into smaller regions and enter into each cell a number that's equal to the size of its region (i.e the number of cells in its region). No two regions of the same size can touch each other orthogonally (i.e sharing an edge).

- In the finished solution, every region must be either entirely shaded or entirely unshaded, and the sizes of all of the shaded regions must share the same odd/even parity while the sizes of all of the unshaded regions must share the other odd/even parity. Which parity belongs to which type of shading needs to be deduced.

- A number in a cell with arrow[s] is equal to the combined amount of cells in the indicated direction[s] that share the opposite type of shading (or opposite parity) of that arrow cell.



Small setter note: The arrow clue from R7C6 wasn't actually needed for a unique solution, but I only added it in for a somewhat smoother transition. Feel free to solve the puzzle without that clue if you'd want to.



Puzzle:  Penpa plus  -  Sudokupad



Good luck and have fun solving!