This is a variation of D. W. Troyka's nice game "Breakthrough". Win by moving any of your acids to the opponent's bank rank. Single pieces move in single steps: either forward or diagonally forward. They also capture diagonally forward.
 
The game is started by a neutral mixer who sets up the position at random. It is allowed to build friendly Adenin-Thymin pairs as well as Cytosin-Guanin pairs. Coupled pairs are invulnerable and can not be beaten. A pair can not move jointly, but only decouple again by moving one of its acids in the normal way. It is possible that for instance a "T" from an AT-pair movess forward to another single "A" to form a new AT-pair.
 
Thanks to D. W. Troyka for his nice game "Breakthrough"! It inspired us to design "DNA Breakthrough". The game is also somewhat related to the "RNA Puzzle" by Ingo Althofer.
 
In the sample position on the Zillions website Black is to move (from bottom to top). He has only a single move to avoid a loss in 2.