Improve Your Mental Arithmetic!

Today's puzzle is a superb arrows-based sudoku - with a twist - by Philipp Blume. You can play it here:
https://cracking-the-cryptic.web.app/sudoku/L64MLDmGdJ

Rules:
Normal sudoku rules apply and on the marked blue diagonal no digit may repeat. The digits along an arrow sum either to the number in the circle (x) or to the square of that number (x times x). (The circled digit does not contribute to the sum in either case).

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COMPETITION:
Mitchell Lee's amazing and brutal Odd Even Killer can be played here:
https://cracking-the-cryptic.web.app/sudoku/8NdmJgFF48

If you solve it, please email us at crackingthecryptic@gmail.com for great glory!

Rules:
Normal sudoku rules apply. Each number outside the grid is the sum of the digits along the indicated diagonal. Digits may repeat within a sum. Cells marked with a gray square must contain an even digit. Cells marked with a gray circle must contain an odd digit.

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August's Monthly Reward Puzzle Hunt by Joke van Veenendaal is OUT! As is our video talking through how to solve it!!
Our patrons can download the hunt on our Patreon page now. You can become a patron here:
You can become a patron here:
https://www.patreon.com/crackingthecryptic

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▶ABOUT US◀
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.

Thank you for watching!
Simon and Mark

Видео Improve Your Mental Arithmetic! канала Cracking The Cryptic