Fritz 18 is designed as a comprehensive training suite rather than just a standalone engine:

engine for free. This AI-based update increases playing strength by approximately 120 ELO points. Product Installer

For those looking for free solutions, there are several strong chess engines and software available:

Chessbase Fritz 18 ((new)) Free Download Site

Fritz 18 is designed as a comprehensive training suite rather than just a standalone engine:

engine for free. This AI-based update increases playing strength by approximately 120 ELO points. Product Installer chessbase fritz 18 free download

For those looking for free solutions, there are several strong chess engines and software available: Fritz 18 is designed as a comprehensive training