I've come up with a KenKen variant - sort of opposite of no-operator.
The usual KenKen rules apply - however for each cage you are only told the operator. In addition the frame numbers on the right give the horizontal sum of the cage totals and the frame numbers at the bottom give the vertical sum of the cage totals.
If you wish you can try two easier ones first on DJApe's site at:
http://www.djape.net/sudoku/forum/viewtopic.php?t=1403
and a much harder one on the assassin site at:
http://www.rcbroughton.co.uk/sudoku/forum/viewtopic.php?f=13&t=414&sid=78404ab23838f1d5c2cccfc126f6356b
This sweet one is based on the times KenKen 385, although there are no given cage totals it is not too difficult and it was very enjoyable to solve.
