Ratings

Does anyone know what the most lop-sided victory for one player is? That is, the greatest rating difference but the player with the lower rating wins (or perhaps draws)

Here are a few I found.

Aaron Reeves (USCF 274) vs James Critelli (USCF 1694) Marshall CC G/60    8/6/2003      1-0

Jay Bonin (2408) vs Serguei Gouloubev (1192) Manhattan Chess Club 9/28/2000  1/2-1/2

Natalie Anumba (505) vs Dragon Vujcic (1792) Manhattan Chess Club 3/9/2000   1-0

Benjamin Blium (1036) vs Boris Privman (2332) Marshall CC

7/7/15 1/2-1/2

You might retitle your thread: Greatest upsets (as measured by ratings difference). 

It is an interesting topic. The problem is that many ratings are wildly inaccurate. (For example, I see that there is a Sergei Golubev with a 2003 FIDE rating.)

Here is one article I found on big upsets:

http://www.chess.com/article/view/the-greatest-chess-upsets-part-1

http://www.chess.com/article/view/the-greatest-chess-upsets-part-2

He focuses on quality games rather than speed chess wins or games decided by simple blunders.

Not quite what I was looking for. A NM or IM beating a GM is not as far fetched as it sounds. Also a 2600 player beating Kasparov is not an upset.

See Joseph Pei (900) vs Tatev Abrahamyan (2400)   1/2 1/2

You haven't provided any links to these games. I searched but couldn't find them. You probably found them on some database that is not online.

Why don't you post them if you find them of interest?

The games aren't online, I found them in the uscf game statistics of the higher rated players. All that is listed is a win or loss or draw.