About Semyon Lomasov
Semyon Lomasov, also known online as MoonlessMay05, is a Grandmaster known for fast, fearless play and an uncanny knack for turning dying positions into wins. A blitz specialist by taste and reputation, Semyon has built a career on tactics, stamina, and very long decisive games.
Career highlights
- Title: Grandmaster (FIDE)
- Preferred time control: Blitz. Expect fireworks and practical decisions under time pressure.
- Peak blitz achievement: 3052 (2026-03-21)
- Performance over time:
- Memorable streaks: longest winning run 28 games, current winning streak 3 games.
Playing style
Semyon thrives in complex, unbalanced positions and often drags games deep into the endgame. Opponents complain that his games feel like marathons—because they are. Expect:
- High endgame frequency and long decisive games (average decisive length around the high 70s in moves).
- Exceptional comeback instincts. Semyon bounces back after material setbacks more than most.
- Fast, practical decision making in blitz; a tilt factor that makes for entertaining swings on any given evening.
Repertoire and openings
Semyon keeps a broad, frequently-surprising opening book. He plays confidently on both sides of the board and switches setups to confuse opponents.
- As Black: French Defense, Caro-Kann Defense, and the aggressive Australian Defense.
- As White: frequent forays into lines that meet the Sicilian and closed positional systems, with strong records against typical replies.
- Tricky favorite: the Dory Defense, where Semyon posts one of his highest win rates in blitz.
Notable rivalries and opponents
Semyon has a few recurring opponents who have generated some of his most dramatic games. A sampling:
- russian_opposition — a long-running series: 24 wins, 15 losses, 2 draws.
- yaacovn — hard-fought: 12 wins, 18 losses, 2 draws.
- blitzstream — frequent sparring partner: 14 wins, 8 losses, 5 draws. Kevin Bordi
- farewelltokings2112 — favorable matchups: 13 wins, 5 losses, 5 draws. FarewellToKings2112
- mischuk_d — solid record: 12 wins, 6 losses, 2 draws. Dmitry MIschuk
Signature game (sample)
A short, representative blitz mini-epic. Replay the opening and watch the middlegame fireworks.
Fun facts
- Best time of day: early mornings around 06:00. If you want him at his sharpest, set an alarm.
- Comes back from bad positions at an impressive rate. Count your material, not your chances.
- Average first capture occurs around move 7, so Semyon often lets the tension build before the fireworks.
Quick links and references
- Explore Semyon’s blitz trends:
- Look up a frequent opponent profile: Kevin Bordi
- Opening study: French Defense and Sicilian Defense