Agustin Armesto (aka Ostinarms)
Meet Agustin Armesto, the chess warrior known online as Ostinarms, a player whose journey on the 64 squares is as thrilling as a rollercoaster ride through a labyrinth of pawns and knights. With a flair for both rapid-fire blitz battles and thoughtful rapid duels, Agustin blends stubborn resilience with a pinch of cheeky tactics that keep opponents guessing — or checkmated.
Since making his mark in 2020, Agustin has faced a vast array of chess foes, clocking over 1,200 combined wins across blitz, rapid, bullet, and daily formats. His rating has dazzled and dazzled, peaking impressively at 822 in blitz (May 2025) and boasting a respectable 651 in rapid games back in 2021. Though the bullet ratings have been a bit trickier to master (with a top of 251), that hasn't stopped him from tackling each game with gusto and a slightly mischievous grin.
A connoisseur of openings, Agustin favors the Van 't Kruijs Opening in blitz—because why not surprise your enemy with a rarely seen weapon? His French Defense is also a secret sauce that led him to over 60% wins in blitz, proving he knows how to make pawns dance in his favor.
Agustin's playing style can be summed up in three words: persistent, unpredictable, and occasionally dramatic. Known for a 60.1% comeback rate, he rarely waves the white flag early. Though his early resignation rate sits at a modest 17.5%, when he stays in the fight, the battles average about 40 moves per win—long enough to give plenty of chances for spectacular blunders or genius saves!
When and how does Agustin strike? He’s sharpest around 1 PM, with a 66.67% win rate at 13:00, but beware if you play him at 23:00, where his luck dips (29% win rate). His record suggests he’s a chess morning person who fuels up well for the day’s strategic skirmishes.
Fun fact!
In his most recent blitz victory, Agustin pulled off a dazzling four-move checkmate using the Van 't Kruijs Opening, demonstrating that sometimes, the underdog plays the ultimate trick and finishes the party early. Even when he loses, it’s often after a fierce battle that keeps spectators on edge—but no shame in checkmate; after all, every loss is a step closer to victory (or at least to a really cool story).
Off the board, Agustin is probably plotting his next move or dreaming of a queen sacrifice that leaves opponents scrambling. Whether a novice or a seasoned veteran facing him, you can bet the game will be anything but boring.
So sharpen those knights and watch your back; Ostinarms is coming!
