Juan Carlos Guerrero Sierra IM

Juan Carlos Guerrero Sierra

International Master of Tactical Brilliance

Born with a chessboard in his hands (or so the legend goes), Juan Carlos Guerrero Sierra, often known by his username jcgs1030, is an International Master recognized by FIDE. A versatile warrior of black and white squares, Juan Carlos has danced through the ranks, proving his mettle in Blitz, Bullet, Rapid, and Daily chess games.

Over the years, Juan Carlos's Blitz rating soared from a solid 2200 in 2015 to a roaring 2508 in 2025. His Bullet gameplay, a furious test of lightning-fast reflexes, boasts a high point near 2270 and dozens of thrilling battles fought with an average rating just above 2100. Never afraid to take risks, he keeps opponents guessing with his fearless and relentless style.

Known for his impressive comeback rate of 88.58% and an almost mythical 100% win rate after losing a piece (yes, you read that right!), Juan Carlos turns adversity into opportunity, leaving opponents scratching their heads and rethinking their openings. His games are long epics, with an average of over 75 moves for wins—clearly, he enjoys a good marathon over a quick knockout.

On the lighter side, Juan Carlos's psychological resilience is tested by a tilt factor of 11, meaning he might have a moment or two of human frustration, but nothing that keeps him from jumping back into the fray. He’s also noted for ending games early just 1.24% of the time—he prefers to fight to the very last pawn.

When it comes to the clock, his win rate is surprisingly high during the early morning hours (shoutout to those 4 AM and 7 AM champions), proving he might be secretly fueled by coffee and sheer stubbornness.

Whether battling longtime rivals like neftegor or leaving new opponents like oferzt wondering what just happened, Juan Carlos Guerrero Sierra remains a formidable figure on the chessboard and an inspiring mind game tactician. If you ever get the chance to face him, beware—a piece down could just be your last mistake!