Bernard Ćosić (kozomoja) — Blitz specialist and crafty tactician
Bernard Ćosić, known online as kozomoja, is a seasoned chess player with a clear preference for Blitz play. Over more than a decade of active online competition he carved a reputation for fast calculation, gritty comebacks, and an appetite for sharp openings like the Sicilian Defense and the quirky Barnes Opening: Walkerling. This bio collects Bernard's style, highlights, and a few playful facts for fans and fellow players searching for Bernard Ćosić, kozomoja, chess, and blitz.
Overview
Bernard is best known as a Blitz specialist who thrives in high tempo battles. He plays large volumes of games across Blitz, Bullet, and Rapid and treats each time control as its own sport. Search engines looking for "Bernard Ćosić blitz chess" will find a player who climbs and re-climbs the ladder rather than sitting at a single peak.
- Username: kozomoja
- Preferred time control: Blitz
- Active years: 2012 to present
- Playstyles: tactical, resilient in lost positions, endgame-aware
Playing style and strengths
Bernard mixes tactical flair with stubborn defense. He is the sort of player who will go for complications, then grin and grind through chaotic middlegames into long endgames.
- Favours open and semi-open positions that reward calculation
- High comeback rate and solid WinRateAfterLosingPiece
- Average decisive game length is long for Blitz, reflecting persistence
- Best time of day to catch Bernard in top form: 01:00 according to his time performance
Career highlights and milestones
Bernard's career is a steady climb with flashes of elite-level blitz form. He often peaks in concentrated bursts after heavy play weeks and has notable results in both Bullet and Rapid as well.
- Reached a Blitz peak above 2180 during a hot streak in October 2025. (2187 (2025-10-13))
- Strong multi-year presence across Blitz, Bullet, and Rapid with thousands of decisive games
- Known for long winning runs and equally dramatic learning streaks; longest winning streak: 12 games, longest losing streak: 13 games
- Interactive rating trend:
Openings and favorite systems
Bernard plays an eclectic but effective opening repertoire. He uses the White initiative and also enjoys dynamic responses as Black.
- As White: Barnes Opening: Walkerling and flexible flank systems
- As Black: Sicilian Defense in many flavors and the French Defense when he wants a strategic fight
- Other frequent choices: Nimzo-Larsen Attack and the Caro-Kann Defense
Opener performance highlights include consistently good showings with the French and strong volume results in Sicilian lines. Those studying Bernard should prepare for sharp, tactical positions out of the opening.
Fun facts, stats, and quirks
A lighthearted list for fans who want trivia and quick metrics related to Bernard Ćosić, kozomoja, and Blitz chess.
- Nickname in the lobby: kozomoja, usually before the opening moves are complete
- Known for making long, clutch endgames. AvgMovesPerWin is unusually high for Blitz
- Psychological quirks: a modest tilt factor and excellent comeback instincts
- Frequently faces top opponents like spartak_moscow and blacktrack1 in repeat matchups
Study this sample game and try a puzzle
Below is a lively mini-sample to replay in your viewer. It illustrates tactical flair and daring sacrifices typical of Bernard's Blitz approach.
- Recreate this miniature:
- Want to study a classic duel? Show a famous encounter
- Visit the profile for more games and stats: Bernard Ćosić
Where to find more
If you are indexing pages or researching Bernard Ćosić for SEO, include keywords like Bernard Ćosić, kozomoja, blitz chess, Sicilian Defense, Barnes Opening, and online chess statistics on the same page for best results. For a quick dive into openings, tactics, and rating trends use the chart and profile links above.