Logic Masters Deutschland e.V.

Today seems like as good a day as any to finally get round to publishing this, a sort of 'difficult second album' follow-up to my Three In The Corner puzzle, which I can now describe as 'As Seen on Cracking the Cryptic'. I am indebted to Garford on the CtC Discord for feedback and help getting the end of this one to work right. I hope you enjoy!

Play

• SudokuPad

Rules

• Normal Sudoku Rules Apply. Fill the grid such that the digits 1-9 appear once each in every row, column, and 3×3 box.
• One For All, and All For One: Every constraint (line, dot, or cage) must contain at least one 1.
• One Is The Loneliest Number: A 1 must not be orthogonally adjacent to any 'friendly' cell. A friendly cell is a cell whose digit matches its row, column, or box number.
• One Ring To Rule Them All: A 1 may not appear anywhere in the ring of cells immediately surrounding the central box.
• Thermometer: Digits along a grey thermometer must strictly increase in value from the bulb to the tip.
• Renban: Digits along a magenta line cannot repeat, and must form a set of consecutive numbers.
• Dutch Whispers: Consecutive digits along a striped orange line must differ by at least 4.
• Killer Cages: Digits cannot repeat within a cage, and must sum to a small number in the corner if given.
• Kropki Dots: Cells separated by a white dot must contain digits which are consecutive
• One Does Simply Walk Into Mordor: The very grid is shrouded by a poisonous fume. Placing a correct digit in any cell on the grid will remove fumes from that cell. Placing a 1 correctly will also remove fumes from cells elsewhere on the grid.