DonSandalio: The FIDE Master Who Made Blitz a Marathon
A Blitz Devotee from the Start
DonSandalio is a FIDE Master whose chess identity is inseparable from the Blitz clock. With a peak Blitz rating of 2429 (2026-09-13), he has spent more than a decade showing that online speed chess can be both a playground and a proving ground. His preferred time control is Blitz, and his record reflects the full, chaotic glory of that format: 2877 wins, 3036 losses, and 367 draws. He plays an enormous number of games, shrugs off defeats, and always returns for more.
From Romantic 1.e4 to a Flank-Opening Rebirth
DonSandalio's online journey began in 2012 at a modest 1401. In that first year, he was a true believer in 1.e4, playing it 758 times. The aggression paid off: by December 2012 he had reached 2173. After a long pause, he returned in 2022 with a changed approach, leaning increasingly on Nf3 and c4 starts. The new repertoire coincided with a rise to a new level, peaking at 2429 in September 2026. His rating story is not a straight line, but it is a steady climb for someone who clearly loves the process.
Openings with Personality
Few players can claim a more eclectic opening book. As Black, DonSandalio is deeply loyal to the Modern Defense; he has played it in more than 800 Blitz games, and he has turned the Czech Defense into a reliable weapon with a 55.25% win rate when Black. Against 1.e4, he also spends plenty of time in the Sicilian Defense. As White, he favors the King's Indian Attack and the English Opening, with a standout 57.23% win rate in the English Opening: Caro-Kann Defensive System. He is the kind of player who would rather try an offbeat gambit than play a dull symmetrical line.
Familiar Rivals
Every Blitz grinder has a nemesis. For DonSandalio, that role belongs to ofer zemertov, his most played opponent with 56 games. The head to head is close but slightly painful, with oferzemertov winning 30 to DonSandalio's 26. The two have shared enough battles to fill a small opening manual, and it is exactly the kind of rivalry that keeps a player coming back for more.
The Numbers Behind the Grind
DonSandalio's stats are full of delightful contradictions. His longest winning streak and longest losing streak are both 13, as if the chess gods demand perfect symmetry. He rarely resigns early, reaching an endgame in 78.88% of his games. His average decisive game lasts around 76 moves, which in Blitz terms is an eternity. He also wins 87.56% of his games after falling behind, and even after losing a piece he still finds a way to win 45.22% of the time. His best time of day is midnight, his tilt factor is a stubborn 13, and when it comes to the clock he is ruthless: he has won 87 games on timeout while losing only 17.
The Verdict
DonSandalio is proof that online chess rewards patience, resilience, and a willingness to play weird openings. He may not always convert, but he never stops fighting. For a FIDE Master who treats every Blitz game like a small adventure, that is perhaps the most dangerous skill of all.