Logic Masters Deutschland e.V.

Yin Yang
Shade some cells such that all shaded cells are orthogonally connected and all unshaded cells are orthogonally connected. No 2x2 area may be fully shaded or fully unshaded.

Minesweeper
The circles act as "minesweeper" clues. Cells containing a circle are always unshaded, and their value is the number of shaded cells in the surrounding 3x3 area (i.e. the up to eight cells that touch the circle either orthogonally or diagonally).

Each gray line satisfies at least one of the following three contraints:

(1) Between Line
Digits on the line must lie (by value) strictly between the digits in both connected circles.

(2) Double Arrow
The sum of the digits along the line is equal to the sum of the digits in the circles at either end of the line.

(3) Parity Bridge
For the line, one attached circle contains an odd digit and the other circle contains an even digit. The odd digit indicates the number of odd digits along the line (not including itself), and the even digit indicates the number of even digits along the line (not including itself).


Link: SudokuPad