The master programmer

Back to the genes. Again according to Richard Dawkins:

The gene is a master programmer. He draws a beautiful analogy between the chess playing computer and the gene as below.

A programmer feeds the chess playing program into a programmer taking into account the rules, strategies and many other things. He does not feed each and every scenario into the computer. That would take a hell lot of a memory. Based on the program, the computer analyzes each scenario, simulates different moves and chooses the best move by which it can survive for a longer time.
This is exactly what the gene does. It writes a master program which, like the chess program, basically contains strategies,policies to survive. Based on this program the survival machines(we and all other living things) are built, which again works based on the program's strategies and try to survive as long as possible!!