The Card Number Validation hole will go live in . Why not try and solve it ahead of time?

Rankings: Holes

Reversi in C++ in chars.

# Golfer Lang Points Chars Time
1st JohandeRuiter 🇳🇱 C++ 1,000 169
2nd ovs-code 🇩🇪 C++ 955 177
3rd MostParsingVex C++ 934 181
4th jared-hughes C++ 889 190
5th MeWhenI 🇻🇦 C++ 867 195
6th error256 C++ 704 240
7th bac0id C++ 653 259