Once the algorithm is identified they can then incorporate this into the keygen. When writing a keygen, the author will identify the algorithm used in creating a valid cd key. A keygen is made available through crack groups free to download. Pros: It is endorsed and partly developed by Garry. The fact that it is in part made by chess legend Garry Kasparov makes is a chess game that chess pros will certainly really enjoy. It does not bother with a lot of “flash” and instead gets by on being a solid chess sim. I think that Kasparov Chessmate is a very solid chess game.