Logic Masters Deutschland e.V.

• Sudoku: Within the central 9x9 grid, place the digits 1 to 9 once each in every row, column and box.
• Irrwisch: All clues have had their digits replaced with letters or with question marks. Any two instances of the same letter (including in different clue types) must represent a different digit from 1 to 9 (an extra grid of cells has been provided for notetaking).
  • A question mark may represent any digit from 0 to 9, and may represent the same number in different clues (a two-digit clue cannot start with a 0).
• Landvermessung: Shade some cells gray such that there are no closed orthogonally-connected loops of shaded cells (including 2x2s). In other words: for any two shaded cells, there can be at most one orthogonally-connected path of shaded cells between them.
  • A circled clue in the grid gives the length of the shortest possible path that visits all shaded cells touching that corner (an infinity symbol [∞] means no such path exists, but that there is at least one shaded cell touching that corner).
• Japanese Sums: Clues to the left and above the grid give the sum of contiguous runs of shaded cells in the indicated row or column, in the listed order (adjacent sums must be separated by at least one unshaded cell).
  • For each row and column, either all clues are given or none are, with the caveat that an asterisk ("*") represents any number of omitted clues, including no clues at all.
• Extra Region Path: The nine astronomical symbols in the grid must all contain nine different digits.
  • In addition, there must be a path of shaded cells that visits all nine of them, in order from 1 to 9.

SudokuPad

NOTES

It took me two months after aqjhs nominated me to be the 27th setter in the Zodiac Project (all previous puzzles in the series can be found on the first puzzle's page, but, after much setting (and much testing), I made this! I will be nominating Zetamath to be the 28th setter in the series, and this will be their disjoint set: