Most famous person you ever played chess against.

Lol

Played two simuls against Jennifer Shahade and simuls against GMs Kudrin and Ibragimov. All were halfway decent games:)

Actually I got crushed by Ibragimov in one of those games, now that I think of it. I tried the dubious opening 1) e4;...e6 2) d4;...c5

Nakamura on ICC

Jersey City, early 1973: a simul against IM (later GM) Andy Soltis. As is the custom, Soltis played White in all games, BUT he allowed us to choose White's first move as long as it was 1. e4 or 1. d4.  I was eager to try out my new weapon against 1. d4,  the KID.  When Soltis got to my board I played (for him) 1. e4?? -- an out-and-out "fingerfehler."  Which I immediately compounded by playing (for me) 1...Nf6?? - not even realizing I HAD NOT opened 1.d4 for him.  Alekhine's Defense of course is a perfectly decent opening,  but not in my hands!  Soltis promptly played 2. e5 and I sat there totally befuddled, gobsmacked, busted! Afterwards he said something like "Alekhine's Defense is a difficult opening;  you should play something else."  I didn't bother to try explaining my mistake.

In the '90s I had OTB encounters with New England legend John Curdo and with Jorge Zamora.  And I do have one USCF Senior Master "scalp": David Griego.  No,  not really:   David was 10 or 11 years old at the time! As Curdo himself liked to say about young players:  "Better beat 'em now. Next year you won't be able to!"

I've played in simuls given by Arthur Dake, John Donaldson, and Roman Dzjinjinchazili (I know the spelling is off on the last name but I sure you will know who I am talking about)

Everyone knows that the correct spelling is Dzindzihaefiarhwdlvknfxdf.  I know because I added it to the word bank in my spellcheck.

he is international master rolly martinez now based in italy.he was only a national master then when hewas here at santiago city.i learned to play bliiz from him our time was one minute against 5 minutes,still its hard to win but after 5 years or seven years  i was  familiarize with blitz playing . thanks to him .proud to be a filipino,as for now he has met his  grandmaster norm in the next sooner he will become one of philippines grandmaster.

I played Hikaru Nakamura in a simul at the CYCC.

I lost, but it was fun!

I played GM Gligoric in a simul when I was in High School. I played weakly and lost in about 19 moves.  

Years later I played in another simul, this one against IM Alexander Fishbein (he later became a GM)  I had black and played a solid variation of the French.  I was able to win a pawn, and kept telling myself "don't blow this".   If he uncorked something great to beat me, so be it, but I didn't want to just give it away.  Anyway I won in about 45 moves or so. I believe he played 18 games, losing one and drawing one. 

R Goletiani - online.. lost after having a crushing position and blundering away a piece.  

Danny Kopec - draw in a simul

GM Ftacnik - lost, another simul.. 

In a long Fide game I played and lost to International Master John Donaldson and International Master Eric Hansen.

IM Atilla Turzo, CC Draw,

IM Daniel Rensch, 2 Losses in the big show,

IM David Pruess, bullet chess loss,

IM Daniel Baratosi, CC Loss.

CM Jozsef Toth, a few bullet losses

NM Gjon Feinstein, bullet loss.

Looking at this list makes me think "wow! I didn't know I played so many masters!"

GM Florian Gheorghiu, 20 Bd Simul @ Westhaven NJ 1980: 1/2 - 1/2 (he has an even record vs Bobby Fischer BTW: +1 -1 =2)

GM Walter Browne, 40 Bd Simul Atlantic City NJ 1981: 1-0

GM Walter Mednis, 6 Bd Simul vs +2000 (USCF) opponents @ 50/2, 1979: 1-0

GM Walter Korchnoi, 40 Bd SImul NJ 1978: 1-0

GM Samuel Reshevsky  (CC - $25 & I provided his PCs) 0-1

GM Arthur Bisguier 16 Bd Simul w/clocks (50/2) Westhaven NJ 1979: 0-1

Everyone was White except for GM Reshevsky

pdela. And conquistador.

I've played Smyslov and Browne in simuls, Pruess OTB.

Probably the most famous person I've played OTB is the current Dean of American Chess, Art Bisguier. Second place might be De Firmian.