It has moved from being just an "opponent" to a "coach," using natural language to explain why a move is good or bad.
Fritz's reputation exploded when it began beating the best human players in the world. Ajedrez Fritz
Realizing that chess could be intimidating, the creators launched ( El Pequeño Fritz in Spanish). It has moved from being just an "opponent"
Fritz was originally developed by Dutch programmer Frans Morsch . Ajedrez Fritz