Overview
Emil Stefanov is an International Master known online as TheHeartofChess42. A Bullet specialist who likes the beautiful chaos of one minute per side, Emil blends deep opening knowledge with uncanny endurance in long, tactical fights. He has a habit of turning lost positions into wins and making opponents wonder if the clock is doing the real work.
Quick snapshot: International Master, preferred time control Bullet, strong in Blitz and Rapid as well. Highlights of recent form are shown below.
Peak highlights: 2526 (2020-07-18) and 2515 (2026-02-12).
Trend preview:
Career highlights
Emil earned the International Master title and carved out a reputation as a practical, fearless player in fast time controls. He has racked up long streaks and dramatic comebacks that keep fans checking the board even when the clock shows seconds.
- Earned FIDE title: International Master.
- Longest winning streak: 17 games.
- Current winning streak: 8 games.
- Remarkable comeback rate: 83.62 percent when recovering from difficult positions.
Playing style and strengths
Emil is a tactically alert, endgame-savvy player who often grinds long games to victory. He is not shy about complex positions and benefits from deep middlegame play.
- Tactical comeback ability: 83.62 percent.
- Endgame frequency: 83.58 percent of decisive games reach endgame phases.
- Average moves per decided game: about 80 to 82 moves.
- Early resignation rate: low at 1.11 percent, meaning Emil rarely gives up early.
- White win rate: 53.18 percent. Black win rate: 47.64 percent.
- Best time of day to play: around 09:00 according to time-of-day trends.
Favorite openings
Emil demonstrates both variety and depth. He mixes tricky gambits with solid defenses depending on the clock.
- As White: Amar Gambit — perfect for surprise attacks and two quick wins in Bullet.
- As Black: Caro-Kann Defense — reliable choice with several solid results.
- Frequently used in Blitz: Sicilian Defense: Four Knights Variation, Cobra Variation with 51 games and a roughly 53 percent win rate.
- Also notable: Bogo-Indian Defense and Australian Defense across time controls.
Opponents and rivalries
Emil has played many regulars online. The list below highlights the most-played opponents and the classic rivalries that shaped his online career.
- semantica: 16 games (Velin Belev)
- fedotov_alexey: 15 games (fedotov_alexey)
- goldenpuppy: 14 games (Ashritha Eswaran)
- 123markopolo: 8 games — positive head-to-head record.
Sample game
Here is a compact, instructive miniature Emil enjoys showing when teaching bullet tactics. Use the viewer below to step through the line.
Quick facts
- Title: International Master.
- Preferred time control: Bullet.
- Streaks: Longest winning streak 17; longest losing streak 9.
- Strength adjusted win rates: Bullet ~48 percent, Blitz ~51 percent.
- Psychology: tilt factor 9 but excellent at comebacks.
- Try these search terms for more: Emil Stefanov chess, TheHeartofChess42 Bullet, IM Emil Stefanov openings.
Want more
Explore Emil's trends and games with the placeholders above. For a deeper dive try the rating trend chart or open the sample game viewer. If you want Emil to coach you, prepare to play fast and keep your mouse fingers warm.