I just found out my (unofficial) Kasparov number is 4! If you count games played at an elementary school chess club that an IM visited and played everyone at a (very huge) handicap (as in no queen or rooks)... well otherwise it's 12.
Patzer -- I'm not at 1900, so I can't challenge you, can you send me one instead?
Done. After reading the fine print, however, I realized that you only get the number by beating someone in the chain. Needless to say, I didn't beat Sammy Reshevsky. So I guess I don't have a low Morphy number after all. 
Done. After reading the fine print, however, I realized that you only get the number by beating someone in the chain. Needless to say, I didn't beat Sammy Reshevsky. So I guess I don't have a low Morphy number after all.
Oh? I was under the impression that only applied to Kasparov numbers.
My Kasparov number is at most 5, from me-Robson-Akobian-Shabalov-Yermolinsky-Kasparov. Following the 400 pts rule, that would make my performance approximately 4800 
. Admittedly, now-GM Robson was only rated about 500 when I played him, but that still counts, right?
If we are not restricting games to wins, then I think Robson has played in a simul by Kasparov before, which would make my number only 2!
Also, I just ran across this thread.
If you count unofficial games as well and don't count wins, then I would get very low numbers since I played players like Grischuk, Nakamura and Kamsky online. So then my Grischuk-number is only 1 :)
I won a game against Aaron Summerscale when he was "only" an FM. Checking my database, I find a win by Summerscale against GM Murray Chandler and a win by Murray Chandler against a certain Garry Kasparov.
The impressiveness of this is dramatically reduced by the fact that my win against Summerscale was in a time handicapped blitz tournament, and Chandler's win against Kasparov was in a simul.
[P.S. With a little more searching, I have slightly improved on that, as Summerscale beat Yermolinsky and Yermolinsky beat Kasparov, both in proper tournament games, and also Summerscale beat Yudasin and Yudasin beat Kasparov, similarly. Seems there's something about chessplayers whose names begin with "Y". 
]
Eternal Patzer, can I challenge you to get a Morphy number of 5?
Sure, but I don't know if an unrated postal game rates a 'real' Morphy number. (Back in the 70's Sammy ran an ad in Chess Life and played all comers for $25 a game)