nc 5.231.58.182 1337
PPC comes from professional programming and coding.
Solve 100 Sudoku games and you will get the flag.
Solvers:
1. Icecube
2. AceInfinity
And you can also test here: http://tech.reboot.pro/mybbchallenges/challenges.php?challenge=26
Note: This challenge is not made by me. I just found it and hosted it.