Aleksandr Sacov: A Blitz Marathoner With a Perfect Daily Record
Aleksandr Sacov, known to the online chess world simply as sacov, is a grinder in the truest sense of the word: nearly 28,000 recorded games, a seventeen-year career that began with a single bullet game, and a reputation for playing long, stubborn, endgame-heavy chess that opponents describe as educational, in the way a treadmill is educational.
Career Arc: One Bullet Game, Then Years of reps
His recorded story opens in November 2009 with exactly one bullet game, a win at 1777, after which he apparently went away for a very long sandwich. Serious activity resumed in 2010 around 1960 blitz, and from there the climb was slow-cooked rather than microwaved: 2300 by 2014, 2500 by 2018, the 2600s by 2020, and a peak of 2749 (2025-05-23) in May 2025.
The volume along the way was absurd. In November 2015 he played 487 blitz games in one month. In November 2018 he somehow found 956. At that pace, lunch becomes a chess term. He remains active and dangerous, riding a current winning streak of four.
Repertoire: 1.d4 With a Travel Kit of Curiosities
As White, Sacov opens 1.d4 with the loyalty of a man who has found his chair. King's Indian Defense structures appear over 1,400 times from the White side, which is either very brave or a filing error. Around that spine live the Gruenfeld 5.Bg5 c6 line (a sturdy 58.75%), the Queen's Gambit Declined Hastings Variation, and roughly 580 games of the mysterious Australian Defense.
As Black, the passport stamp is the Scandinavian Defense, played 4,537 times and counting. Against 1.d4 he turns to the Tarrasch, his most productive big weapon at nearly 55%. The bench includes the Alekhine Defense, Poisoned Pawn lines, the Diemer-Duhm Gambit, and bullet cameos by the Amar Gambit, for moments when the clock matters more than the theory.
A taste of his bread-and-butter Scandinavian tabiya, viewed from his side of the board.
Rivalries, Sparring Partners, and Punch Cards
Every grinder has a nemesis, and Sacov has Rogelio Jr Antonio, against whom he has logged 158 games with 42 wins, 101 losses, and 15 draws. That is less a rivalry than a loyalty program with bruises.
Tanitoluwa Adewumi offers a genuine rivalry at 77 games split nearly even, 34-38-5. Chaturanga71 sits at the pleasant end of the ledger, dispatched 47-15-5, while Jura Ochkoos (29-9-5) and rodrigo21 (33-19-3) round out the regulars.
Style: Slow, Stubborn, and Slightly Superhuman at Comebacks
- Endgame frequency of 83%: he takes nearly every game to the endgame, averaging about 80 moves. Losses average 81.3 moves, wins 74.7, meaning he loses slowly, which opponents describe as character-building.
- First capture on move 7 on average. The opening is handled with monastic patience.
- A 93.3% comeback rate, and he still wins 48.6% of games after dropping a piece. Total blowouts occur just 0.3% of the time.
- Early resignation rate of 0.15: he fights to the last pawn, then negotiates with the pawns it left behind.
- Tilt factor of 14. The man is a thermostat.
- 72,264 checks delivered, most often by the queen, closely tailed by the rooks. Statisticians call it a healthy marriage.
Preferred Time Control: Daily, Apparently
Here is the twist: Sacov's preferred time control is Daily chess, the gentle format that grants a full day per move. His record there: seven games, seven wins, zero losses, zero draws, a flawless 100% score. Statisticians call that a small sample size. Sacov calls it a career highlight, and after 27,857 games of blitz and bullet research, it is hard to argue with the method.
His rapid record is even more efficient: three games, three wins, including one Siberian Attack. Why play more when the sample is already perfect?
Quick Facts and assorted trivia
- Longest winning streak: 14. Longest losing streak: 14. Perfectly balanced, as all things should be.
- Peak bullet rating: 2568, set in May 2023.
- Best hour of the day: noon, a 66.1% win rate. Worst: 11:00, just 35%. The difference, clearly, is lunch.
- Tuesday is his weakest day, Thursday his strongest. The margins are small, but the grudge is real.
- Games opened with 1.h4: fifteen in 2015, best described as mood pieces.
- Opponents check him 3.05 times per game; he answers with 2.59 and wins 56% of games when he checks first.