Judith Bishop, Nigel Horspool, Tao Xie, Nikolai Tillmann, and Jonathan de Halleux. Code Hunt: Experience with Coding Contests at Scale. In Proceedings of the 37th International Conference on Software Engineering (ICSE 2015), JSEET, Florence, Italy, May 2015.
[PDF] Acceptance Ratio: 28%: 20 full+7 short/72
Read more here: the Code Hunt Game homepage