Can You Derive X In Less Than An Hour?

Prowling Tiger's latest puzzle smashes Simon repeatedly over the head before he limps over the finishing line... Try it here:
https://cracking-the-cryptic.web.app/sudoku/T7bPh967rT

Rules:
Normal sudoku rules apply. Numbers on the outside of the grid give the sum of all the digits between the 1 and 9 in that row or column. Sandwich clues with the slash represent "or". So a 5/10 clue would mean the sum is either 5 or 10. The 39-arrow represents the sum of the digits along the indicated diagonal. The "x+1" in r5c4 means that the digit equal to "x+1" must be entered in that cell.

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Miracle Sudoku is OUT on Android, Steam and App Store.

Steam: https://store.steampowered.com/app/1377260/Miracle_Sudoku/
App Store: https://apps.apple.com/us/app/id1527363795
Android: https://play.google.com/store/apps/details?id=com.StudioGoya.MiracleSudokuCTC

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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
Mitchell's own video solution is available NOW to our patrons on Patreon.
https://www.patreon.com/crackingthecryptic

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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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 Can You Derive X In Less Than An Hour? канала Cracking The Cryptic