Originally posted by vipiu
did you read the chessbase post about that unrated player that was winning all his games as white and loosing all his games as black in the Olympiad, getting a rating performance of 2300+...and he was in his 50s....unrated player...unbelievable....has a win against a GM!

Yohannes Simbolon of Indonesia. He actually drew his last game (with White), thus spoiling his perfect win with White, lose with Black record.

Here is his win against a GM. How many question marks does 29. ... f4 deserve?
http://www.chessgames.com/perl/chessgame?gid=1521196