Logic Masters Deutschland e.V.

I am happy to present my third take on pencil puzzle/sudoku hybrid, today introducing Heyawake! :-)
I hope you will enjoy and I would be really grateful for all the comments and ratings.

Chaos construction: Divide the grid into nine orthogonally connected nine-cell regions, draw their borders, and place the digits 1 to 9 once in each row, column, and region.

White region dots: Digits in cells joined by a white dot are consecutive and belong to the same region.

Black region dots: Digits in cells joined by a black dot are in a 1:2 ratio (i.e., one digit will be double the other) and belong to different regions.

Circles: Digits in circles indicate how many cells of their own region including themselves they see orthogonally (region borders block vision). Each circle belongs to a different region.

Heyawake: Shade some cells so that no two shaded cells are orthogonally adjacent and the remaining unshaded cells form one orthogonally connected area. There cannot be a horizontal or vertical line of unshaded cells that goes through 2 or more region borders.

Squares: Digits in squares indicate how many cells of their own region including themselves are shaded. Each square belongs to a different region.

Shaded cells: Three [red] shaded cells in the grid have been given. Digits in the remaining shaded cells are greater than at least 2 their orthogonal neighbours (the rule does not apply to given [red] shaded cells).

SudokuPad Link

Heyawake Explanation:

You can see on the example above how heyawake works. You can also try to play an example here or a big 9x9 heyawake here before you solve the sudoku. Rules are also explained here.