Inventure 2011 was a mini-competition on inverting / subverting IF puzzles and tropes, organized by Christos Dimitrakakis. There were no entries.
- Submission deadline: January 21, 2011.
- Voting deadline: February 21, 2011.
- Winners were to be announced on February 28, 2011.
- Inventure: A proposal for an inverse puzzle mini-competition - R*IF thread, November 24, 2010.