This is for more advanced players: When I played chess I liked Chessbase's products. They have their fingers in many pies, including engines, interactive train

This is for more advanced players: When I played chess I liked Chessbase's products. They have their fingers in many pies, including engines, interactive trainings, game databases etc. Most of the content is created by IMs/GMs and is very good quality. Unfortunately everything they do is Windows-only. Playchess, their online chess portal is on iOS and it's absolute crap compared to the Windows client.