I enjoy participating in the International Conference for Functional Programming Contest, an annual coding marathon.

• ICFP Contest 2005 - Cops & Robbers AI
• ICFP Contest 2006 - Implement UMIX VM and then solve puzzles
• ICFP Contest 2007 - Implement VM to render image, finding clues
• ICFP Contest 2008 - Mars rover AI
• ICFP Contest 2009 - Satellite control
• ICFP Contest 2010 - Car and fuel production
• ICFP Contest 2011 - 256-slot magic-the-gathering-like game
• ICFP Contest 2012 - Boulder Dash alike AI
• ICFP Contest 2013 - Infer function definitions
• ICFP Contest 2014 - Packman-alike AI (Lisp and 8-bit)
• ICFP Contest 2015 - Hexagon Tetris AI
• ICFP Contest 2016 - Origami