The Advent of code site for 2025 http://adventofcode.com is a well thought out set of daily puzzles that are typically solved by writing software.
The FPGA side challenge that caught my attention: https://blog.janestreet.com/advent-of-fpga-challenge-2025
This is my idea of fun! Here's one of the more colorful fpga's solving Day 8 in real-time. (click to view the 2min video of the full solve).
and the full summary page of the fpga solutions to solve this years Advent of Code puzzles
