Language Details: Scheme

Scheme is a functional programming language and one of the two main dialects of the programming language Lisp, following a minimalist design philosophy specifying a small standard core with powerful tools for language extension.

Scheme article on Wikipedia
Code Jam 2012 Contestants using Scheme
Qualification Round
Used in 28 solutions by 11 contestants:
Round 1A
Used in 4 solutions by 3 contestants:
Round 1B
Used in 4 solutions by 2 contestants:
Round 1C
Used in 10 solutions by 4 contestants:
Round 2
Used in 2 solutions by 1 contestants:

Submission Origin

Japan (6 contestants)
United States (4 contestants)
Austria (1 contestant)
China (1 contestant)
United Kingdom (1 contestant)