Tetris AI with genetic algorithms, an old university project. (C) 2005 Christer Byström
The paper (in Swedish) can be found here: http://www.ida.liu.se/~729G50/studentpapper-05/christer-bystrom.pdf
The software can be built as a client optimizing the genes, running in console mode, or as a client using the SDL library. If you run bin/etetris.exe you can activate the AI by pressin C.