Fritz is an interactive chess program developed by the ChessBase company. It provides an intuitive and user-friendly chess playing environment, with a variety of features designed to help players of all levels improve their game. It includes a sophisticated chess engine that allows players to play against the computer, or against other online players. Fritz also includes a variety of tutorials and instructional videos that can help players learn and improve their game. Additionally, the Fritz app and website allow users to play chess against their friends or family members, or to participate in various tournaments and leagues.
Lichess is a site for playing against humans / Fritz is a desktop application for playing against computer.