It wasn't all that long ago that Gata Kamsky was one of the absolute top players in the world. He's still no slouch, obviously, but it's stunning to see that he is now out of the world's top 100. He was still in the top 100 a few weeks ago, during the Calgary International, but although he tied for second he still lost points.
Here are a couple of his games from that tournament, a loss and a win. The loss was a disaster against Gil Popilski, who subsequently tied for first in the U.S. Open, while the win was an impressive victory over Kayden Troff that prevented him from tying for or taking clear first.
The double reminder? The first is of the human condition: errare humanum est - to err is human. It was a very strange game all around: Kamsky chose a (dubious) Sicilian sideline, but although it was he who chose to leave the beaten track he apparently did so without a proper knowledge of the variation in question. It's hard to know exactly what went wrong: maybe he was improvising, or perhaps he mixed things up. Whatever the case, his position was already poor in the opening, and then he blundered.
The second reminder is a happier one, of his excellence. Kamsky brutally outplayed the young American GM in the last round, demonstrating that there was a reason he was in the world's absolute elite from the early 1990s until very recently, not counting the period of his retirement. Perhaps Kamsky lacks the motivation at this stage of his life to make a serious push to return to the super-elite, but if he doesn't return to the top of world chess it won't be due to a lack of talent.