Rseko

Overview

Rseko is an online bullet chess specialist whose entire career can be summarized in three characters: b3. Across nearly 14,000 rated bullet games, Rseko climbed from a humble 1355 rating in October 2018 to a 2542 (2025-06-23) peak, building one of the most lopsided opening repertoires in speed chess. This is a player profile for anyone who has ever wondered what happens when a person plays more bullet games in a month than most people play in a lifetime.

The Book of b3

Of Rseko's roughly 4,853 white games in 2025, 4,527 began with 1.b3. That is about 93 percent of all white openings, which is not a repertoire so much as a covenant. The Nimzo-Larsen Attack has been Rseko's white-side identity since 2018, piling up more than 6,500 games at a healthy 53.9 percent win rate, with the Classical Variation adding 135 more at a nearly identical clip. The remaining sliver of spice is Nf3, played just often enough to prove that Rseko remembers other pieces exist.

A typical Rseko opening in motion:

The Black-Side Cabinet of Curiosities

As Black, Rseko reaches for choices most players would not recognize on sight: the Barnes Defense (2,941 games), the Australian Defense (1,801 games), the Amar Gambit, and the Colle [redacted] Rhamphorhynchus Variation, a name so classified it arrives pre-censored in the records. Buried in the cabinet is the Alekhine Defense, played 176 times with a 54.6 percent win rate, the best result of any black opening. The most respectable choice is the most successful one. There is a lesson in that. Rseko has evidently chosen not to learn it.

Winning by Flag

Of 7,135 bullet victories, 3,564 came by timeout, meaning nearly half of Rseko's wins involve the opponent's flag falling rather than a checkmate landing. Only 1,513 wins arrived by checkmate, with 2,058 more by resignation. This is not a flaw; it is an art form. Rseko drags bullet games into marathon territory with an 79.5 percent endgame frequency and average games of roughly 74 moves, then lets the clock do the punching while the opponent admires their beautiful position.

The resilience numbers are equally telling:

• Early resignation rate of just 3.23 percent, because Rseko does not quit.
• 72.5 percent comeback rate, and a 47 percent win rate even after losing a piece.
• A tilt factor of 12, paired with a 16-game winning streak against a worst losing streak of only 12.
• 71 career stalemates, salvaging half points from wreckage when all else fails.

Familiar Faces and Nemesis Reports

Heavy volume creates heavy rivalries, and Rseko's ledger reads like a buddy-cop cast:

• UWontLastLong: 35 games, record of 22-13. Fittingly named opposition for a flag-hunter.
• future_sgm84: 33 games, record of 22-10-1, another favorite punching bag.
• Damien: 23 games, record of 15-7-1, the happiest head-to-head on file.
• Paul Rohwer: 31 games, record of 13-18. Every hero needs a nemesis.

Peak Hours and the Quirk File

Rseko performs best at 11:00, where the win rate hits 66.7 percent, and the 10:00 to 14:00 window is reliably profitable. The 9:00 hour collapses to 43.9 percent, midnight sits at 47.7 percent, and 4:00 AM is simply not recommended. Challenge Rseko before the coffee kicks in, or accept the consequences.

• Queen checks are the weapon of choice: 14,528 career checks by the queen.
• First to check 57.4 percent of the time, winning 59 percent of those games.
• Saturday is the best weekday at 52.0 percent.
• Draws are rare: just 446 in nearly 13,900 games.
• November 2025 alone featured 3,966 bullet games, roughly 132 per day, a workload usually reserved for a chess server's stress test.

Legacy

Whether opening 1.b3 for the ten-thousandth time, refusing to resign from positions that would make grandmasters blush, or quietly winning on time while the opponent celebrates a phantom advantage, Rseko has carved out one of the most distinctive bullet chess careers on record. The rating graph spikes and dips like a heart monitor, the flag falls, and Rseko plays on.