Logic Masters Deutschland e.V.

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Rules:

• Normal Sudoku rules apply.
• Benefactor (aka Donor Cell) rules:
  • each row, column, and box contains exactly one benefactor (donor cell), and exactly one beneficiary (receiver cell).
  • In each box the donor cell transfers all of its value to the receiver cell in the same box, so that the donor cell has a value of 0, and the receiver cell has a value which is the sum of the digits of the donor and receiver.
  • Donor cells and receiver cells cannot overlap.
  • No two donor cells may contain the same digit.
  • No two receiver cells may contain the same digit.
• XV rules:
  • Whenever two adjacent cells sum to a multiple of 5 (taking into account donor/receiver adjustments), the roman numeral representing their sum is shown on the border of the two cells.
  • • XXV : sum is 25
    • XX : sum is 20
    • XV : sum is 15
    • X : sum is 10
    • V : sum is 5
  • All possible sums congruent to 0 mod 5 are given.
• Odd: the gray circle contains an odd value, taking into account donor/receiver adjustments.

Play Online:
   traditional look and feel (Xs and Vs)
    f-puzzles: Benefactors
    ctc: Benefactors

   alternate look and feel (diamonds)
    f-puzzles: Benefactors
    ctc: Benefactors



If you enjoyed this puzzle...

Various puzzles were created by different authors using this ruleset.
Mad-Tyas has suggested the authors mention the name "Nosferatu" on their puzzles page.
Once this has happened, the puzzles can be found using the following search:
"https://logic-masters.de/Raetselportal/Suche/erweitert.php?skname=x&sktext=x&suchtext=Nosferatu"