To mark the Turing centenary (who isn’t?) a new competition has been launched:
To celebrate this centenary, we have developed a collection of one-person games played on a Turing tape.
An example is given on the competition website. According to a set of movement rules, the player must:
Construct a sequence of moves that when begun in a state with one coin on one of the squares of a Turing tape (and all other squares empty) ends with one coin at a displacement of 12 squares from the initial position (and all other squares empty).