Hi everyone I had a question on the King's Gambit Cunningham defense which goes 1.e4 e5 2.f4 exf4 3.Nf3 Be7.  I know in the line 4.Bc4 Bh4+, white can do well with 5.Kf1, where white's inability to castle is made ok by black's lack of proper development.  But I like to castle.  A friend introduced me recently to the Cunningham gambit which after 4..Bh4+ plays 5.g3 fxg3 6.0-0 - Here black can either play 6..gxh2 where white then plays 7.Kh1, or black plays 6..d5 and white replies with 7. Bxd5.  Does anyone have any advice on this sharp line?  My King's Gambit books merely mention the gambit without going too deep into analysis.  I know its sharp but is it sound?  If not, what is black's best defense? This is one crazy line!