I found this article even more helpful than the one cited in the earlier post, as it places more emphasis on the interesting way he was legally gaming the system. This was an issue the United States Chess Federation had to address decades ago...
Despite the extra Grand Prix points on offer to those who win their knockout matches before the tiebreaker stage, ambition took a back seat on day one of round 1 of the Riga Grand Prix. Seven of the eight games were drawn, some with no fight whatsoever, and only one game finished with a winner.
The second leg of the FIDE Grand Prix Series organized by World Chess started on Friday in the National Library in Riga.
Only one game ended on a decisive result, leaving David Navara in a must-win situation for day two.
Igors Rausis is a (now) Czech grandmaster, age 58, whose rating was generally in the low 2500s or high 2400s. A fine player in his own right, of course - making GM is always impressive, even if we tend to take them for granted when we focus on the players fighting for the world championship.
As far as I know, the ongoing U.S. Senior Championship is the first such event in U.S. history, an invitational round-robin to determine the championship for players over 50 years of age. (Which - c'mon - isn't *that* old, even if some of you young squirts think it is.