These are simple drone-like pieces generated algorithmically using only a basic sine-wave instrument. The csd files are created by analyzing PGN (Portable Game Notation) files, which are standard format files used to store chess games. The program was written in C++.
Game # 1 - Standard tuning pentatonic in A major
Game # 2 - 5-TET
Game # 3 - Just Intonation pentatonic
Game # 4 - 11-TET pentatonic
FourGames - 3h8TET - This piece was generated from a multiple game PGN file which includes all four of the other games.
The source chess games used are classics from the 1800's.