ChessBase is a company that markets chess software, maintains a chess news site, an operates a server for online chess. It is a leading company in the transformation of chess study along with its leading commercial database competitor, Convekta (Chess Assistant), and the groundbreaking classification work of Chess Informant. Massive databases that contain all historic games permit analysis that had not been possible prior to computing. Databases organize data from prior games; engines show possibilities in new ones (and errors in human play), permitting, for example, definitive answers to certain endgame problems.