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 rhdqor213 C 1,000 138
2nd JohandeRuiter 🇳🇱 C 945 146
3rd ovs-code 🇩🇪 C 890 155
4th MostParsingVex C 863 160
5th jared-hughes C 852 162
6th MeWhenI 🇻🇦 C 798 173
7th mousetail 🇳🇱 C 719 192
8th bac0id C 582 237
9th madex 🇩🇪 C 559 247
10th LHLaurini 🇧🇷 C 439 314