Cobro Professor (aka Yohankrokov)
Meet Cobro Professor, the chess force who proves that blitz is a battleground and bullet is a battlefield. Starting from humble beginnings with a blitz rating of under 1000 in 2022, this player has soared spectacularly, peaking at an astonishing 2705 in March 2025. Not bad for someone who probably still forgets where the coffee cup is half the time!
Known for a tactical awareness that makes opponents wonder if they're playing against a grandmaster or a chess wizard with a crystal ball, Cobro Professor has a comeback rate of nearly 80%. When the going gets tough, the tough get going — and probably launch an elegant counter-attack.
Playing styles? Cobro Professor is the master of patience with an average of over 68 moves per win and a whopping 72% frequency of endgames. But watch out mid-game, because if they lose a piece, they still win almost half the time. Resignation rate is low-ish at 9%, hinting that quitting isn’t really in their vocabulary — except maybe when the snacks run out.
Bullet games are another story: with a peak bullet rating of 2579, Cobro Professor can think and execute moves faster than you can say “checkmate.” Their favorite bullet opening? The Van't Kruijs Opening, boasting a jaw-dropping 73% win rate — because why not mess with people’s heads from the very first move?
The player’s rapid rating maxed out at 2364, blending solid technique with fierce competition. Opening repertoire is impressive and varied, with a particular fondness for the Alapin Sicilian and tricky Sicilian Defense variations. Balanced performance as White (50.58% win rate) and Black (46.19%) shows they can dance with both sides without missing a beat.
Cobro Professor’s psychological makeup? A tilt factor of 11 suggests some fiery passion, but nothing a deep breath and a well-timed rook move can’t soothe. Their best time of day to play is… midnight. When most people are asleep, Cobro is busy plotting checkmates and raising ratings — a true night owl warrior.
Recent games tell the tale of a cunning strategist who knows when to press and when to resign gracefully. For instance, a recent gem saw Cobro applying the Queens Pawn Opening with finesse, forcing a resignation from a tough opponent in less than an hour. Meanwhile, their last checkmate was delivered in a lightning-quick Vienna Game — because why not finish with style?
Opponents beware: with a mixed bag of results against familiar rivals but a general trend toward outplaying competition, Cobro Professor keeps their friends close and their checkmated adversaries closer. Win streaks have reached up to 15 games, but even losses are lessons learned the hard way.
All in all, Cobro Professor is a chess player who combines studious preparation, quick hands, and a hint of mischief. Whether it’s blitz, bullet, or rapid, they’re ready to take on the challenge — just don’t ask them why their knight suddenly vanished in the middle of the night.
“Blunder? I prefer the term 'creative chance'.”
What you’re doing well in blitz
You have demonstrated sharp tactical awareness in complex moments and the ability to spot forcing lines. This helps you seize initiative when your opponent overextends or misplaces a piece.
- You adapt well to different openings, showing flexibility and a willingness to test ideas rather than sticking to a single, narrow repertoire.
- You manage to press in open positions and exploit active piece play, which is a valuable strength in fast time controls.
- In longer blitz sequences, you maintain practical chances by simplifying when favorable and driving to clear, instructive endgames.
Areas to improve for faster, more consistent results
- Time management under pressure: in blitz, it helps to allocate a strict but flexible time budget per phase of the game (opening, middle game, endgame). If you’re unsure about a tactic, default to the safer, plan-based move and come back to deeper lines when you have more time.
- Repertoire consolidation: you’ve shown comfort with several openings, but blitz can benefit from a tighter, 1–2 opening systems for both sides. This reduces decision fatigue and improves your ability to execute a clear plan quickly.
- Endgame technique: when games go long, you can benefit from concrete endgame practice (rooks and pawns, king activity, opposition). Strengthening these patterns will help convert advantages and rescue draws when material is balanced.
- Post-game analysis habit: after each blitz session, note one or two concrete takeaways and try them in the next game. Focus on patterns (tactics you missed, mis-evaluated exchanges, or missed prophylaxis) to build consistent improvement.
Concrete, actionable plan for the next 4 weeks
- Week 1: daily tactics practice (15–20 minutes) focusing on forcing moves, checks, and tactical motifs. Pick 1–2 openings to rehearse with a simple plan for both colors.
- Week 2: reinforce time budgeting. In every game, decide on a rough plan within the first 5 moves and adhere to it unless you see a clearly identified tactic or tactical concession by your opponent.
- Week 3: endgame drills twice this week. Practice rook endings and pawn endings with set positions to improve technique under time pressure.
- Week 4: review two recent blitz games in detail. Write down the top 2 learning points from each game and apply them in a small repertoire adjustment.
Opening performance snapshot and practical tips
- Your results show solid activity in several lines; in particular, Caro-Kann defenses and Bishop’s Opening Vienna Hybrid show favorable results compared to some other lines. Consider leaning on these more in blitz to reduce risk and build confidence in the practical middlegame plans.
- Keep a compact, easily executable repertoire for blitz. If you encounter unfamiliar replies, aim for solid, plan-driven lines rather than chasing sharp, complicated ideas under time pressure.
- Use quick, safe developing moves in the opening and prioritize king safety and central control. A few extra preparatory moves that you’re comfortable with will save you time later in the game.
Strategic takeaways from your rating trend data
The longer-term trends suggest momentum and growth, with some fluctuations in shorter windows. Use that momentum to reinforce steady improvement habits: consistent practice, targeted opening work, and disciplined endgame play will help you sustain gains over time.
Reference resources
- Opening reference: Sicilian Defense
- Endgame concepts: Endgame technique
- Profile placeholder: ivan%20kukushkin
🆚 Opponent Insights
| Recent Opponents | ||
|---|---|---|
| barca_hamilcar | 2W / 0L / 0D | |
| Giorgi Kacheishvili | 0W / 1L / 0D | |
| Aron Pasti | 2W / 0L / 0D | |
| trickertiger | 1W / 0L / 0D | |
| username748 | 1W / 0L / 1D | |
| carokann-player33815 | 0W / 0L / 1D | |
| furious_octopus | 1W / 0L / 1D | |
| r2d2-000 | 1W / 0L / 1D | |
| endrju_zet | 2W / 0L / 0D | |
| mahdirezaee7 | 1W / 2L / 0D | |
| Most Played Opponents | ||
|---|---|---|
| magionator | 16W / 14L / 12D | |
| kostya0705 | 9W / 8L / 7D | |
| martimhernandez2 | 6W / 11L / 0D | |
| dr_fruit_dubai | 8W / 7L / 0D | |
| drwonderkid | 5W / 6L / 3D | |
Rating
| Year | Bullet | Blitz | Rapid | Daily |
|---|---|---|---|---|
| 2025 | 2659 | 2707 | 2423 | 1346 |
| 2024 | 2104 | 2402 | 2354 | 1104 |
| 2023 | 2179 | 2302 | 2263 | 1141 |
| 2022 | 1250 | 1682 | 2054 |
Stats by Year
| Year | White | Black | Moves |
|---|---|---|---|
| 2025 | 489W / 437L / 87D | 432W / 492L / 102D | 81.0 |
| 2024 | 321W / 315L / 67D | 306W / 358L / 56D | 71.1 |
| 2023 | 375W / 265L / 45D | 332W / 284L / 55D | 72.9 |
| 2022 | 110W / 59L / 7D | 103W / 61L / 11D | 69.9 |
Openings: Most Played
| Blitz Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| Unknown | 274 | 138 | 134 | 2 | 50.4% |
| Sicilian Defense: Alapin Variation | 193 | 92 | 84 | 17 | 47.7% |
| Sicilian Defense: Taimanov Variation, American Attack | 182 | 75 | 85 | 22 | 41.2% |
| Caro-Kann Defense | 135 | 68 | 58 | 9 | 50.4% |
| Sicilian Defense: Closed, Anti-Sveshnikov Variation, Kharlov-Kramnik Line | 123 | 52 | 57 | 14 | 42.3% |
| Sicilian Defense | 91 | 47 | 37 | 7 | 51.6% |
| Amar Gambit | 88 | 42 | 40 | 6 | 47.7% |
| Bishop's Opening: Vienna Hybrid, Hromádka Variation | 80 | 45 | 27 | 8 | 56.2% |
| London System: Poisoned Pawn Variation | 79 | 38 | 29 | 12 | 48.1% |
| Sicilian Defense: Closed | 66 | 27 | 35 | 4 | 40.9% |
| Rapid Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| Sicilian Defense: Alapin Variation | 126 | 64 | 54 | 8 | 50.8% |
| Sicilian Defense: Taimanov Variation, American Attack | 57 | 23 | 30 | 4 | 40.4% |
| Sicilian Defense: Closed, Anti-Sveshnikov Variation, Kharlov-Kramnik Line | 47 | 29 | 16 | 2 | 61.7% |
| Sicilian Defense | 37 | 19 | 15 | 3 | 51.4% |
| Caro-Kann Defense | 29 | 15 | 10 | 4 | 51.7% |
| Bishop's Opening: Vienna Hybrid, Hromádka Variation | 25 | 12 | 12 | 1 | 48.0% |
| Sicilian Defense: Closed | 25 | 11 | 13 | 1 | 44.0% |
| Amar Gambit | 23 | 3 | 13 | 7 | 13.0% |
| Bishop's Opening: Horwitz Gambit | 20 | 11 | 7 | 2 | 55.0% |
| Sicilian Defense: Accelerated Dragon | 20 | 11 | 8 | 1 | 55.0% |
| Bullet Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| Amar Gambit | 195 | 106 | 79 | 10 | 54.4% |
| Caro-Kann Defense | 81 | 41 | 37 | 3 | 50.6% |
| French Defense | 56 | 26 | 26 | 4 | 46.4% |
| French Defense: Exchange Variation | 55 | 31 | 20 | 4 | 56.4% |
| Caro-Kann Defense: Exchange Variation | 36 | 17 | 18 | 1 | 47.2% |
| Amazon Attack | 36 | 23 | 12 | 1 | 63.9% |
| London System: Poisoned Pawn Variation | 34 | 14 | 20 | 0 | 41.2% |
| Czech Defense | 31 | 11 | 17 | 3 | 35.5% |
| Sicilian Defense: Alapin Variation | 27 | 15 | 10 | 2 | 55.6% |
| Barnes Defense | 24 | 18 | 4 | 2 | 75.0% |
| Daily Opening | Games | Wins | Losses | Draws | Win Rate |
|---|---|---|---|---|---|
| Bishop's Opening: Vienna Hybrid, Hromádka Variation | 2 | 1 | 1 | 0 | 50.0% |
| Sicilian Defense: Closed, Anti-Sveshnikov Variation, Kharlov-Kramnik Line | 1 | 1 | 0 | 0 | 100.0% |
| Sicilian Defense: O'Kelly Variation | 1 | 0 | 1 | 0 | 0.0% |
| Caro-Kann Defense: Exchange Variation | 1 | 0 | 1 | 0 | 0.0% |
| Sicilian Defense | 1 | 1 | 0 | 0 | 100.0% |
🔥 Streaks
| Streak | Longest | Current |
|---|---|---|
| Winning | 15 | 2 |
| Losing | 11 | 0 |