Getting Ready for ‘Advent of Code 2025’ – Review of the Past Years

In preparation for this year’s Advent of Code, I’m looking back on the past years, collecting a few statistics.

• From 2015 to 2024, I collected 153 stars
• The lowest was 2016, with one star
• In 2020, I collected the highest number of stars: 31

• The solutions are spread over…
  • 170 Ruby files
  • 3 GraphVis files
    Yes, I did solve some of the puzzles using GraphViz & a printer.

In some cases, I chose Graphviz to visualise the situation and support finding a solution to the puzzle at hand.
Here’s an image for an example data set for one day in 2022:

The full view of a complete input data set ()from another year was a bit more complicated:

One puzzle was about finding a Christmas tree, and this is how ‘mine’ looked like:

I’m already looking forward to another ‘Advent of Code’!