Normal sudoku rules apply: Fill the grid with digits from 1 to 9, so that every row, column, and 3x3 box contains each of the 9 digits exactly once.
Dotted lines define some cages within the grid. Digits may not repeat within a cage. Whenever two cages share an edge, the sum of the digits in one of the cages equals the product of the digits in the other. For example, a cage containing 1, 3, and 6 might share an edge with one containing 2 and 5, since 1+3+6 = 2*5. Cages which meet only at a corner are not restricted in this way.
This puzzle is intended as an easy introduction to the constraint. Here are some harder ones:
Productive Killers by Yawnus
Sudoku Variants Series (465) - Productive Killers by Richard
Lösungscode: Row 9.
am 1. Mai 2026, 23:41 Uhr von dzamie
I went to enter the solution code only to find I'd solved this one last year, too.
Still an excellent puzzle. It's so nice when the pieces all start falling into place.
am 1. Mai 2026, 06:56 Uhr von Nylimb
Added link to SVS puzzle by Richard.
am 31. März 2026, 10:42 Uhr von Nylimb
Added link to puzzle by Yawnus.
am 29. Juli 2025, 01:22 Uhr von Nylimb
Added link to puzzle #3.
am 23. Juli 2025, 22:13 Uhr von dzamie
This one was tough! Kept losing track of which numbers were where in a few boxes.
am 23. Juli 2025, 06:02 Uhr von Nylimb
Added link to puzzle #2.
am 17. Juli 2025, 19:41 Uhr von Yawnus
Very nice mystery cage puzzle!
am 17. Juli 2025, 14:47 Uhr von Qodec
That was much fun, thanks!
am 17. Juli 2025, 12:47 Uhr von RockyRoer
More products puzzles plz!! :-)
@RockyRoer: Puzzle number 2 is now available at:
https://logic-masters.de/Raetselportal/Raetsel/zeigen.php?id=000O7Q