HomeHacker News Show HN: I built a puzzle / programming challenge with a 0.125 BTC prize http://bit.ly/2EV8m89 byAbhi •December 30, 2018 0 Show HN: I built a puzzle / programming challenge with a 0.125 BTC prize http://bit.ly/2EWl3AD December 30, 2018 at 10:24PM Tags: Hacker News