Hands / Touching hands / Reaching out //
Touching me, touching you //

This is a Touchy Sudoku, which is a challenge to set and this version of this puzzle is a bit of a challenge to solve.

Rules:
Normal Sudoku rules apply.
Renban: Digits on each hollow pink line form a non-repeating set of consecutive digits in any order.
Kropki: Cells separated by a white dot contain consecutive digits. In cells separated by a black dot, one digit is double the other. Not all possible dots are given.
Touchy Sudoku: Every digit is adjacent to at least one consecutive digit. That is, every 1 is adjacent to a 2, every 2 is adjacent to a 1 or 3 or both, and so on.

Estimated difficulty: 2.5 out of 5

Solve on SudokuPad

I found this constraint in a puzzle by Clover from a few years back. In Touchy Sudoku, every single digit is next to a numeric neighbor, which seems like it could be like Renban, except most digits have two neighbors, and only needs to be next to one. Which seems like it could lead to dominoes, except most digits can be neighbor to two different digits, or to two instance of itself. So it’s not quite like anything else, it’s Touchy Sudoku!

Rules:
Normal Sudoku rules apply.
Digits within cages do not repeat, and sum to the total in the top-left corner of the cage.
Touchy Sudoku: Every digit is adjacent to at least one consecutive digit. That is, every 2 shares an edge with a 1 or 3 or both, and so on.

Estimated difficulty: 1 out of 5

Solve on SudokuPad