The Marathoner of Blitz
Дондуков Сэнгдорж, better known on Chess.com as Donseng, is a FIDE Master who plays online chess like a long-distance runner with a very unconventional sleep schedule. He has a massive collection of rated games and no fear of the Play button. If one trait defines him, it is persistence:
traces a winding, busy journey full of heavy weekends, quiet dips, and sudden explosions of form.Blitz is clearly his home pool. He has played thousands of those games, including more than 600 in a single month at one point. The math is simple: either he never sleeps, or he sleeps with the mouse in his hand.
Bio last updated 2026-09-11