Logic Masters Deutschland e.V.

My first attempt at setting Octoquadri, a puzzle type invented by AnalyticalNinja, along with a variant that I've been fascinated with recently, Clock Faces. Hope you enjoy solving the puzzle!

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Rules:

Octoquadri: Fill the grid with 8 of the digits 1-9, such that each digits appears exactly twice, and no digit repeats in a row, column, or 2x2 box.

Clock Faces: Four digits around a clock faces circle are placed in an increasing order starting from one of the four cells and going clockwise (white circle) or going anticlockwise (black circle). All clock faces circle are given (negative constraint).

Renban: Digits on a purple line form a set of consecutive, non-repeating digits in any order.

Ratio Pairs: Digits separated by a black dot have a 1:2 ratio. Not all dots are given.

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Puzzle Link: SudokuPad

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My youtube channel on solving sudoku: Crusader Puzzle