Cox talks about the term "dangerous weapon" as a chess line that seems counter-intuitive and obscure and likely to surprise strong opponents.
I lost with White to one of those "vicious mating attacks" by Black in the classical Kings Indian last night. Yup, I checked Kaufman and went wrong early, according to theory. It's hard to remember all of this. Despite its reputation at the highest levels of theory, the Kings Indian gives good practical chances in club play. White has to be accurate.
I'm told that USCF ratings for older players are going down, because "the kids" are getting stronger playing computers and each other before entering general competition. "1600" today is much better than it was in the 1960s.