Logic Masters Deutschland e.V.

Another lingua-franca puzzle - I'm quite enjoying these!

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Rules:

- Normal Sudoku rules apply.

- Lingua Franca - in each 2 x 2 box of cells, there must be at least one digit from each of the following sets: (1, 2, 6) [digits with three-letter names], (4, 5, 9) [digits with four-letter names], and (3, 7, 8) [digits with five-letter names].

- Killer Cages - digits inside a cage are distinct and add up to the number in the top left corner of the cage.

- Thermometers - digits along a gray thermometer strictly increase from the bulb.

- X pairs - digits with X between them sum to 10. No negative constraint.

- Ratio Kropki dots - digits with a black Kropki dot between them have a ratio of 2:1. No negative constraint.

- Modular lines - each set of three digits along a teal modular line must have at least one digit from each of the following sets: [1,4,7], [2,5,8], [3,6,9]

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Sudokupad