Sudoku: Within the main 9x9 grid, each row, column and 3x3 box must contain the digits 1-9 once only.
X-Sums: Numbers in cells outside the grid contain the sum of the first X digits in the row or column where X is the digit in the nearest cell.
Numbers in cells along a thermometer increase from the bulb end.
Lösungscode: All digits in the first column from top to bottom including the x-sum values
am 22. April 2026, 22:40 Uhr von VitP
starts out level 1, but a lot of it is level 2.
i.e. accessible to all solvers