Logic Masters Deutschland e.V.

She is an incredibly prolific and extremely skilled setter so absent an obvious theme to imitate, and feeling inadequate to the task of matching their skills, I decided to take a left field approach of creating this puzzle themed around a charity she had mentioned supporting at SudokuCon 2026 in Manchester, hoping that it might trigger some aktent memories and fool the voters into thinking it must be her. Alas, the attempt failed but hopefully the puzzle is still fun and a little different.

The charity - Capital Tea is a worthwhile one if you are interested in supporting it.

Also, James Sinclair publishes a regular newsletter and has a book of hand-crafted sudoku - Artisanal Sudoku which is available at the link above and is an excellent addition to any puzzler's bookshelf.

In addition, you can find her winning puzzle here.

Here you can solve the puzzle online:

Solve on Sven’s SudokuPad

Normal sudoku rules apply. Place the digits 1-9 once each in each row, column, and 3x3 region.

Diagonal Sum: black numbers outside the grid give the sum of the digits along the indicated diagonal. Cages: the sum of the digits inside each cage is equal to the small number in the top left corner (if given), and digits cannot repeat within a cage. Thermometers: digits on the green thermometer increase from the bulb. Region sum lines: box borders divide each blue line into segments with the same sum. Entropic lines: along pink lines, every set of three adjacent cells contains one low digit (1-3), one middle digit (4-6), and one high digit (7-9). Parity lines: along red lines, digits alternate between odd and even. 21 line: along the black line, digits sum to 21. White dots: Digits in cells separated by a white dot are consecutive. All possible white dots are given.

Happy solving! Here you can solve the puzzle online:

Solve on Sven’s SudokuPad

Thanks to Vikki and and Ratfinkz for testing.