Number Place ver 1.0

    -------- -------- --------
   |  2 6   |  9 1 5 |  3   4 |
   |    1   |  4     |  2 6   |
   |  3 7   |  2     |      9 |
    --------+--------+--------
   |        |    7   |        |
   |        |  1 5 9 |  7 4   |
   |  7   3 |  6     |    9 1 |
    --------+--------+--------
   |  4     |  8   6 |    1 5 |
   |  5   1 |      3 |      6 |
   |  8 2   |  5   1 |    3 7 |
    -------- -------- --------