The Grunfeld Formula - Andrew MartinGrunfeld Formula by Andrew Martin The 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. Naturally, a universal approach using