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

Rankings: Holes

Reversi in Bash in chars.

# Golfer Lang Points Chars Time
1st saito-ta 🇯🇵 Bash 1,000 140
2nd retrohun Bash 693 202
3rd MeWhenI 🇻🇦 Bash 478 293