The Most Complex Sudoku Ever

You can try Prasanna Seshadri's brilliant sudoku "Compounding The Co-Dependency" here:
https://cracking-the-cryptic.web.app/sudoku/TmMBJj8jbr

Rules: [See the page here: https://www.patreon.com/posts/37065725]

Normal sudoku rules apply. In addition, there are some special CTC rules in this puzzle: There are 7 pairs of variants in this sudoku, totalling to 14 different rules. For each pair, one area will follow one variant and the other area will follow the other variant. It is up to the solver
to determine which variant gets used where. Throughout there will be no converse rules like “all possible dots are given” etc. Here are the pairs:

All clues on the left/All clues on the right:
A) Outside Parity – The clue gives the first N cells of the same parity until the first cell of the other parity in that direction.
B) Skyscraper – The numbers represent the heights of skyscrapers. The clues outside give the number of skyscrapers seen from that direction. Taller skyscrapers block shorter ones.

All clues on the top/All clues on the bottom:
A) Serbian Frame – The clue gives the sum of the digits in the 3rd and the 4th cells in that direction.
B) X-Sums – The digit in the first cell takes up the value of N where the clue outside gives the sum of the first N cells in that direction.

1st Box/ 9th Box:
A) Arrow – The digit in the circle must be the sum of the digits along the line.
B) Thermo – The digits must be in increasing order from the circle to the end of the line.

2nd Box/ 8th Box:
A) 3-Difference – The white dots mean that the digits on either side must have a difference of 3.
B) Consecutive – The white dots mean that the digits on either side must have a difference of 1.

3rd Box/ 7th Box:
A) Even Set – The shaded cells must contain 2, 4, 6 and 8 in any order.
B) Odd Set – The shaded cells must contain 1, 3, 5 and 7 in any order.

4th Box/ 6th Box:
A) Kropki – The white dots mean that the digits on either side must have a difference of 1. The black dots mean that of the two digits on either side, one must be double the other.
B) XV – The white dots mean that the digits on either side sum to 10. The black dots mean that the digits on either side sum to 5.

5th Box: There are two clues here and each of them will follow one of the two rules below.
A) Quadruple – The digits shown must appear in the 2x2 area of cells they are in the middle of.
B) Quad Sum – The number is the sum of all four digits in the 2x2 area of cells the clue is in the middle of.

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Hi! We're Simon Anthony and Mark Goodliffe, two of the UK's most enthusiastic puzzle solvers. We have both represented the UK at the World Sudoku Championships and the World Puzzle Championships. We're also "cryptic crossword" aficionados. Mark is the twelve-time winner of The Times championship and Simon is the former record holder for most consecutive correct solutions to The Listener crossword. We hope we can help your puzzle solving while also introducing you to some of the world's best puzzles.

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Видео The Most Complex Sudoku Ever канала Cracking The Cryptic