i'm not a sudoku player, but i thought that the objective was...
...each column, each row, and each of the nine 3×3 boxes (also called blocks or regions) contains the digits from 1 to 9, only one time each (that is, exclusively).
(from wikipedia sudoku article, emphasis added).

since the second row ("-,2,2,-,9,-,7,1,5") contains 2 twice, is your test input correct?

In reply to Re^2: Subroutine overhead in Perl by Anonymous Monk
in thread Subroutine overhead in Perl by enemyofthestate

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