Full Time Blitz Artist
Aleksandr Domalchuk-Jonasson is a FIDE International Master with a serious online alter ego: chucksterf10. The title may sound formal, but the play style is anything but. He has spent the recorded period turning blitz queues into his personal laboratory, playing enormous numbers of games and making sure none of them are too quiet.
His preferred habitat is clear from the data: blitz. He plays so much that his rating history looks less like a career and more like a hiking trail in a mountain range. He can reach dizzying heights and then immediately fall into a valley, only to climb right back up. At his best in blitz, he hit 2897 (2025-11-04), which is the sort of number that makes opponents double-check the username.
A Repertoire With Strong Opinions
If you prepare for chucksterf10 by memorising mainline theory, you may be in trouble. As White, he regularly plays the Nimzo-Larsen Attack and the Amar Gambit, two ways of telling the opponent that normal chess rules do not apply. As Black, he has spent many games in the Barnes Defense and the Modern Defense, which keeps the opening books of his opponents mostly useless.
The data also contains something called the Rhamphorhynchus Variation. The name sounds like a pterodactyl that wandered into a chess convention, yet he has played it again and again. That is the real signature of this player: curiosity over caution, chaos over comfort.
Friends, Frenemies and Recurring Opponents
Chucksterf10 clearly believes that rivalries are part of the fun. Against Nacer Alvarez, he has been close to perfect, with 15 wins and only one loss in their recorded meetings. The same cannot be said for his series against Vignir Vatnar Stefansson. In 18 games, gmvignirvatnar won 14 of them. That is not a rivalry, that is an Icelandic chess master collecting rent.
Still, he kept coming back for more. Recurring opponents are a sign of respect, even when the scoreboard is painful.
Lessons From the Logbook
The statistics paint a portrait of someone who never stops fighting. He wins more often with the white pieces, but does not collapse as Black. He has put together a 10 game winning streak, and also a 10 game losing streak, proving that the same brave choices that make him brilliant can sometimes lead to spectacular accidents.
- His best winning hours are around 11:00 AM, so schedule a game with him then only if you enjoy pain.
- Thursday appears to be his least successful day, which makes it the best time to challenge him.
- After losing a piece, he still wins roughly 47 percent of the time. Do not celebrate early.
- His comeback rate sits above 86 percent, which means many lost positions end with the opponent staring at a defeat they thought was impossible.
- When he starts checking, he loves to use his rooks. This is a player who believes in using the whole board.
The Verdict
Aleksandr Domalchuk-Jonasson is not the kind of International Master who gives quiet, predictable lectures. He is the one who rolls the dice, plays the odd opening, and turns blitz games into miniature adventures. You may beat him, you may lose to him, but if you play chucksterf10, you will definitely remember the game.