Logic Masters Deutschland e.V.

• Normal 6x6 sudoku rules apply.
• Yin-Yang: Shade some cells so that all shaded cells form one orthogonally connected area, and all unshaded cells form another orthogonally connected area. No 2x2 area of cells may be entirely shaded or unshaded.
• Fog: Some cells are hidden by "fog" meaning you cannot see their contents. Some fog may be removed when a digit is correctly filled. Digits can be logically deduced, no guessing is needed.
• First Impressions: Digits in shaded cells must be greater than both the topmost digit in their column, and the leftmost digit in their row.
• Even: Digits on a solid gray square are even.
• Ratio Kropki: Digits separated by a black dot have a 1:2 ratio.
• Arrow: Digits on an arrow sum to the digit in the attached circle.
• Juzter diamonds: Black and white diamonds are purely to cover fog corners and help with the third secret about Yin Yang puzzles and aren't restricted in any way. Furthermore, there is not any rule with repeats on diamonds, the sum of digits on the diamond, or anything else really!

Play in SudokuPad

Version without a redundant clue, but the solve path is a bit bifurcatey