Logic Masters Deutschland e.V.

Rules:

Normal chaos construction sudoku rules apply, i.e. divide the grid into nine regions of nine orthogonally connected cells each and fill a digit from 1-9 into each cell such that no digit repeats in any row, column or region.

Red clues are sandwiches, i.e. they indicate the sum of the digits between the 1 and the 9 in the corresponding row or column. Those sandwiched digits also all belong to the same region and the 1 and 9 in that row/column are not in that same region.

Blue clues are X-sums, i.e. they indicate the sum of the first X digits in the corresponding row or column from the side of the clue, where X is the digit in the first cell from that side. Those first X digits are also all in the same region and the next digit after that is in a different region.

Along thermometers digits increase from the bulb to the tip.

The digit(s) in a white circle appear at least once in the four surrounding cells.

Try it online here.

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