This repertoire is often discussed in chess forums like Chessable as one of the most updated and coherent guides for Black players looking to master the Breyer. Material on the breyer. - Chessable
The post you're likely looking for refers to a popular chess opening course by GM Michael Roiz released through Modern Chess in 2019 . Complete Spanish Repertoire For Black The Bre...
It is designed for players who enjoy "slow, maneuvering positions" and deep theoretical understanding rather than immediate sharp tactical clashes. This repertoire is often discussed in chess forums