Rudolf Jun: The FIDE Master Who Never Stops Moving
Rudolf Jun, also known online as rudolfjun2005, is a FIDE Master with an online chess record that spans more than a decade. While the site lists Daily as Rudolf's preferred time control, the real fireworks happen in the bullet arena, where the rating graph has climbed from triple digits to some rather serious numbers.
From Early Grinder to FIDE Master
Rudolf's journey began modestly. In 2012, the bullet rating hovered in the 700s and even dipped toward 640. But the volume of games was always there. By 2013, a single month included 277 bullet games. That kind of dedication eventually paid off with the FIDE Master title, earned from FIDE after years of steady improvement across all time controls.
The rating trajectory is remarkable.
shows a player who kept climbing, with a peak of 2711 (2026-06-15) in bullet and 2545 (2025-11-27) in blitz. For a player whose preferred beat is Daily, that is an awful lot of fast chess.Playing Style and Opening Repertoire
Ask the data what Rudolf Jun plays and the answer is simple: e4. Year after year, the first move frequency is overwhelmingly e4. When opponents answer back, the opening battles quickly move into familiar territory. As White, Rudolf handles the Sicilian Defense with confidence, scoring 68.75 percent in blitz and 74.36 percent in rapid. The French Defense is another favorite hunting ground, and the Scandinavian Defense also appears often in the record books.
A typical exchange might look something like this:
. It is a simple start, but the games that follow are rarely simple. Games are long, with wins averaging around 78 moves and losses around 84 moves. The endgame frequency of 82 percent shows a player willing to grind until the very end.Rivalries and Resilience
No rival has crossed Rudolf's path more often than aktij123. Their 91-game series sits at 37 wins to 39 losses with 15 draws, a genuine rivalry. Then there is matesjenej, who has played Rudolf 36 times and lost all 36. Some rivalries are less competitive than others.
Rudolf also has a knack for escaping trouble. The comeback rate is 86.06 percent, and even after losing a piece, the win rate holds at 50.71 percent. The longest winning streak reached 29 games, while the longest losing streak of 18 was followed by exactly the kind of bounce back you would expect from a titled player.
By the Numbers
Rudolf's opening win rates across different time controls are fun to browse.
breaks down the most common lines, from the Amar Gambit to the Alapin Variation. The most used opening in bullet is the Amar Gambit with 376 games and a 56.91 percent score, while the Sicilian Defense appears in nearly every control.Some other favorites from the data:
- First to check in 55.5 percent of games, winning 58.41 percent of those.
- Most common checking piece: the rook.
- Best time of day to play: 1:00 AM, when the win rate jumps to about 59.6 percent.
- White win rate of 54.3 percent and Black win rate of 51.93 percent.
- Daily rating chart: shows the patient side of the same player.
Rudolf Jun may be listed as a Daily fan, but the numbers paint a portrait of a versatile, relentless chess player who is just as happy toasting a bullet game at 1:00 AM as they are grinding out a Daily game. FM is a title, but for Rudolf it also feels like a warning label: this player will not stop until the board is empty.