Diego Cornejo (donelectron15): The Comeback King of Speed Chess
Meet the Player
Diego Cornejo, known online as donelectron15, is a tireless battler whose rating graph looks less like a smooth curve and more like a mountain range with a pulse. He first stepped onto the digital board in 2015, and by 2026 he had pushed his Blitz rating to a towering 2435 (2026-08-04) and his Bullet rating to 2448 (2026-03-30). While he lists Rapid as his preferred time control, his true kingdom has always been the whiplash world of faster clocks.
Signature Openings and a Surprise-Ready Repertoire
As White, Diego is a devoted practitioner of the Nimzo-Larsen Attack (1.b3), an offbeat king's fianchetto that has carried him through thousands of online battles. It is his most reliable weapon in both Blitz and Bullet, and it regularly produces some of his best winning percentages. As Black, he is a lifelong explorer of the Sicilian Defense, sampling the Closed, Accelerated Dragon, and Najdorf lines with equal appetite. He also enjoys the Modern Defense, the Pterodactyl Variation, and a steady diet of Caro-Kann and East Indian setups.
Here is a typical Nimzo-Larsen formation from his world:
Rivalries That Define a Career
Diego is a player who thrives on repeat meetings. His most frequent dance partner is Federico Canias, who has faced him 18 times, with Diego coming out on top 11 times. He has also built a commanding head-to-head record against duglet (11 wins, 2 losses) and aharris77 (10 wins, 1 loss). Not every rivalry tilts his way, though: Cayetano has taken the series 11 to 5, proving that Diego's toughest tests often come from familiar faces.
The Comeback Numbers
If one word defines donelectron15, it is resilience. His comeback rate sits at an eye-popping 86.33 percent, and even after losing a piece he still finds a way to win 45 percent of the time. He almost never resigns early, with an early resignation rate near 1 percent, and he has delivered 606 checkmates while being mated only 243 times. His longest winning streak reached 16 games, and his longest losing streak stretched to 13, yet he survived both extremes without losing his nerve.
- Longest winning streak: 16 games
- Longest losing streak: 13 games
- Comeback rate: 86.33 percent
- Win rate after losing a piece: 45.17 percent
- Best hour of the day: 10:00, with a 61.54 percent win rate
His Blitz climb is a testament to steady, stubborn improvement:
.Opening Scoreboard
The stats paint the picture of a player who is most dangerous with the white pieces when he controls the tempo. The Nimzo-Larsen Attack wins 58 percent of his Blitz games, and his sharpest variation is the Sicilian Defense: Closed, Anti-Sveshnikov Variation, Kharlov-Kramnik Line, where he scores over 70 percent as White. Against lower-rated opposition he feasts, winning nearly 75 percent of those games, while he holds his own against equals at 59 percent. His overall opening performance tells the full story:
.What's Next for donelectron15
Diego Cornejo is still climbing. With Blitz and Bullet peaks north of 2400 and a fighting spirit that refuses to fade, donelectron15 is a name to watch in any speed chess lobby. If he ever applies that resilience to a serious Rapid push, his modest Rapid numbers may soon look like ancient history.