Mafia defence against Grand Prix


- 2.f4 is not the Grand Prix. That requires the moves Nc3 and ..Nc6 to be included.
- There is no reason for this 2..e5 innovation as 2..d5! is quite good. (This is the reason for Nc3 on move 2.)
- 5.h4 is a better try than your 5.O-O. We have a Kieseritzky where White has an extra move Bc4 vs. the nondeveloping ..c5. Why is it 'dubious'? 5...g4 6.Ne5 Nh6 7.d4 looks hideous for Black.