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Calcudoku puzzles

My database includes 4597 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row and every column contains the digits 1 through 9. Each box must also be calculated according to number and operator. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

2178156 puzzles downloaded.

36*
21*
8-
240*
6-
18*
35*
36*
96*
756*
315*
10*
756*
192*
320*
14*
2-
9*
36*
288*
168*
60*
160*
27*
63*
12*
35*
48*
30*
Showing puzzle number: 2539
Puzzletype: Minus,Multiply
Startnumbers: 81
Difficulty: Difficult ()
Solution methods: SPC SMC SSB SSL ROP RP RSNA DC
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