This puzzle is incredibly difficult. I'm not sure if it's solvable by humans. Attempt it at your own risk.
click on the puzzle image to play (or don't)
KROPKI - Cells that are adjacent are separated by a white dot. All possible dots have been given.
COUNTING CIRCLES - The number of times digits appear in a circle is equal to the number of circles in the puzzle.
KILLER - Digits in a cage can't repeat, and sum to the number in the middle.
ENTROPIC LINES - Digits on a peach line have low (123), medium (456), or high (789) entropy.
GERMAN WHISPERS - Adjacent digits on a green line may differ by up to five or more.
RENBAN - Digits on a pink line are in a set of orthogonally connected cells in any order.
BALANCED DOMINOS - Orthogonally adjacent cells always contain digits in a 1:1 ratio.