The Grünfeld Formula the big greek Then enter the intriguing world

Then enter the intriguing world of the Blackmar-Diemer Gambit

Fred Reinfeld Chess Classics

He gives illustrative games that emphasize the key themes

How to exploit Black's weakening pawn moves

In the modern era these lines have mainly been championed by Vladimir Kramnik and Lev Aronian

The Grünfeld Formula the big greek Then enter the intriguing worldThe story goes that a low rated player once bravely asked Viktor Korchnoi his advice about what opening to play against a stronger opponent. Play Grnfeld was the grumpy reply. Play Grnfeld against everything apart from 1 e4. I have no way of verifying this story, but it certainly inspired me to think about whether this was possible and the end result is this new ChessBase course.