MathDoku has very similar rules as Killersudoku. A digit must occur exactly once per row and column. Unlike in the Killersudoku all the basic arithmetic operations are represented. The result for a block is marked with a number and the operation. For subtraction and sivision, it is no matter in what order are the operands.
Please note that in a block a number can occur several times!
There are no digits given, start therefore preferably with the fewest results per block.
Theoretically, it is easier than Killer Sudoku, but since there are no sub-squares, it is even two notches harder. It's definitely a top-notch puzzle!
You may print the current game with "print", also with the unique solution. The solution should be unique, if not, please write us!
Other terms for this game are „Minuplu“, „Basic“, „KenDoku“, „CalcuDoku“ or „Yukendo“.

For in-between:

Mathdoku with small fields in 6x6 7x7 and 8x8

For lunch:

The daily Mathdoku in 9x9 with 2 different levels plus archive


The daily Mathdoku in 10x10 with 2 different levels plus archive

For quite a long lunch breaks (really):

Mathdoku in 12x12 plus archive