A Sudoku Of Ice And Fire

Today's sudoku is a tribute to the constructor grkles from his friend Playmaker6174. It's called Fire Flower And Ice Flower and it's really rather brilliant. Give it a try at the following link:

https://app.crackingthecryptic.com/su...

Rules:
Normal sudoku rules apply. The digit in the red cell (r1c1) is high [6,7,8 or 9]. The digit in the blue cell (r9c9) is low [1,2,3 or 4]. Digits along a purple line form a set of non-repeating consecutive digits (which can be in any order). Adjacent digits along a green line must have a difference of at least 5. A digit in a yellow cell must be greater than all of the orthogonally adjacent cells.

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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.

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