| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| killer sudoku hard | 0.47 | 0.5 | 3816 | 45 | 18 |
| killer | 0.37 | 0.1 | 8160 | 80 | 6 |
| sudoku | 0.9 | 0.5 | 953 | 11 | 6 |
| hard | 0.01 | 0.6 | 6831 | 94 | 4 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| killer sudoku hard | 1.03 | 0.3 | 8375 | 59 |
| sudoku online killer hard | 1.58 | 0.8 | 1999 | 55 |
| epoch times killer sudoku hard central | 0.21 | 0.4 | 272 | 10 |
| epoch killer sudoku hard central | 0.21 | 1 | 6112 | 44 |
| hardest killer sudoku online | 1.18 | 0.4 | 7873 | 53 |
| killer sudoku online online | 1.55 | 0.6 | 6352 | 52 |
| online killer sudoku free | 0.06 | 0.4 | 4726 | 34 |
| killer sudoku by sudoku | 1.99 | 0.8 | 7762 | 6 |
| killer sudoku online free daily | 0.09 | 0.5 | 8865 | 42 |
| killer sudoku online daily | 1.53 | 0.7 | 7256 | 36 |
| killer sudoku online archives | 0.19 | 0.2 | 3993 | 35 |
| the hardest killer sudoku | 1.68 | 0.5 | 589 | 61 |
| how to killer sudoku | 0.85 | 0.2 | 1525 | 74 |
| how to solve difficult killer sudoku | 1.55 | 0.9 | 4941 | 97 |
| free killer sudoku game | 1.61 | 0.6 | 1245 | 82 |
| killer sudoku free download | 1.87 | 1 | 6242 | 54 |
| killer sudoku for pc | 0.99 | 0.3 | 943 | 40 |
