The puzzle has been solved!
Congratulations to Arpox, who was the first person to solve the final stage and claim the 0.125 BTC! They’ve posted an amazing write-up on Medium, so check it out if you want to see how they solved the puzzle.
Here are the Bitcoin transactions for all four stages:
- 1CSSrZSSRf1RyShKGsYXwJzzsjPXi7p7gz (0.005 BTC)
- @loueed on Hacker News
- 1CubeqWWJp39eGEZt8S8K5MCc8XqmjsCNL (0.005 BTC)
- 1TrexT3K6sHy5N8qcAdbfSw8vvFK2JWy3 (0.005 BTC)
- 1J8dc1baKVcg1gDocZSqf87pjUsKCx6AUw (0.125 BTC)
- @Arpox on Medium
I’ve published all of the source code on GitHub, and I’ve written a series of blog posts with the solutions:
Welcome to the 2018 Bitcoin Programming Challenge!
This puzzle has four stages. You must solve each stage before you can proceed to the next stage. Completing a stage will give you the private key for a Bitcoin address. The first three stages have a prize of 0.005 BTC, and the final stage has a prize of 0.125 BTC: 1J8dc1baKVcg1gDocZSqf87pjUsKCx6AUw
If you’re the first person to complete a stage, you can claim the Bitcoins and transfer them to your own address. Good luck!
Before you begin, make sure you install a Bitcoin wallet program. You also need to know how to convert a 256-bit private key into the WIF format. Install the bitcoin-explorer command-line tool, or you can use this Ruby script.
The first stage is a CSS game called PixelPerfect, with 8 CSS puzzles. You are given some HTML, and you have to write some CSS that produces the target image.
If you want to skip the CSS game and start with a programming challenge, then you can start at stage 2:
You are given a set of 3-dimensional blocks with different shapes. You must find the correct orientation and position for each block so that they form an 8x8x8 cube.