Profile: Sơn Đặng
Sơn Đặng, known to the online chess world as NTBT_DHS, is a Vietnamese International Master who has turned internet play into an art form. With more than 27,000 analyzed games to his name, he is the kind of player who appears in your lobby, your arena, and your dreams. His domain is bullet chess, where he has reached a peak of 2906 (2021-09-04) and built a reputation as one of the most active and dangerous speed specialists on the platform.
The Bullet Marathoner
If there is one word to describe NTBT_DHS, it is volume. His bullet rating history reads like an epic: months with over 900 games, a 22 game winning streak, and a career that has crossed the 2900 barrier at its very best. His preferred time control is bullet, and his statistics back that up completely. He plays his finest chess around 13:00, when his win rate climbs and his legendary composure holds firm.
His style blends quick development with an unshakeable will to fight. He wins 87.2% of the games in which he falls behind, which helps explain why his
chart is so rich with action. He rarely resigns early, he adores the endgame, and his endgame frequency sits near 85%. Even in bullet, his decisive games average roughly 80 moves, a sign of a player who plays real chess even when the clock screams otherwise.Rivalries
No biography of NTBT_DHS would be complete without his incredible rivalries. His most frequent opponent is Davit_Tiraturyan, a fellow online warrior who has faced him 635 times, a number that would make professional match organizers blush. There is also Tuan Minh Le, who has traded blows with him across 276 battles, and Safal Bora, against whom Sơn enjoys a winning record that feels very on-the-nose.
Opening Repertoire
As a 1.d4 loyalist with a secret fondness for 1.e4, NTBT_DHS has built a repertoire for speed and survival. With the black pieces, he dives into the Modern Defense with real commitment, playing it more than 2,200 times in bullet alone. The Czech Defense and the Pirc Defense also feature heavily, revealing a King's Indian soul beneath the surface. When he does reach for 1.e4, the Amazon Attack is a favorite, and his love for flank openings shows in a steady diet of the Nimzo-Larsen Attack.
His preparation depth has climbed through the years, from a median prep depth of 3 in 2016 to 6 in 2021. That is the mark of a student of the game, even when the game lasts exactly one minute.
Career Highlights
Sơn earned the International Master title from FIDE, a reflection of years of serious chess. Online, the numbers are just as impressive. He reached a peak bullet rating of 2906 (2021-09-04) in September 2021 and a peak blitz rating of 2857 (2025-12-09) in December 2025, both exceptional marks for a speed chess specialist.