Meet Haralambos Tsakiris
Haralambos Tsakiris, known online as hatsak7, is a FIDE Master with a personality as big as his opening repertoire. He is a true gladiator of the digital chess arena, spending most of his time in blistering blitz and bullet battles. With over 7,000 rated games under his belt since 2024, he is a force of nature who never shies away from a fight, even when the clock is screaming.
His rise is nothing short of meteoric. Starting with a modest blitz rating in early 2024, he climbed the ladder with a ferocious 49-game winning streak that left opponents scrambling. His style is chaotic, creative, and unapologetically aggressive, which explains his love for offbeat openings and his tendency to outlast everyone in endgames.
Playing Style: All Gas, No Brakes
Haralambos is the kind of player who will play the Amar Gambit with white and the Scandinavian Defense with black, often in the same session. He thrives on unbalanced positions and is happiest when the theory runs out early. His average game stretches to nearly 80 moves, suggesting that he plays to the bitter end, squeezing every drop of counterplay from lost positions.
His numbers tell a story of a player who is fearless against stronger opposition. He wins 66.6% of games against lower-rated players, but that drops to 27.4% against higher-rated ones. That said, his comeback rate is a remarkable 88.9%, and he wins 42% of games even after losing a piece. If you think you have him beaten, think again.
Favorite Battlefields
In blitz, his absolute weapon is the Sicilian Defense: Alapin Variation, where he scores a crushing 76.7% as white over 30 games. He also shows a soft spot for the Four Knights Game and the French Defense when he wants to keep things solid. But his real love is the bullet board, where he has played over 5,700 games, testing every weird idea ever conceived.
His most played opening in bullet is the Amar Gambit (332 games), a truly eccentric choice that reflects his refusal to play boring chess. He also has a strange fondness for the Hungarian Opening: Wiedenhagen-Beta Gambit and the Australian Defense, which he plays with both colors. You will never catch him in a standard mainline if he can help it.
Rivalries and Nemeses
Every hero needs a villain, and for Haralambos, that role is played by NEBRA. They have faced each other 48 times, with nebrabp winning 32 of those battles. It is a rivalry that has produced 5 decisive draws, and if you ask Haralambos, he will tell you that revenge is a dish best served with a rook lift.
Another recurring foe is LadyCockroach, who has defeated him 28 times in 33 meetings. But Haralambos does not just lose to everyone. He holds a winning record against Volen Dyulgerov (11 wins to 8) and has shown he can dominate when he gets the right position.
Fun Facts and Quirks
- Night owl: His best winning time is 2:00 AM, and he has a 100% win rate at that hour. The later it gets, the stronger he becomes.
- Longest streak: 49 consecutive wins. That is not a typo.
- Comeback king: He rescues 88.9% of lost positions, which is just shy of a miracle every time.
- Resignation rate: Only 0.67% of his games end in early resignation. He will make you prove it to the bitter end.
- First capture average: He makes his first capture around move 7, preferring to develop chaos before grabbing material.
The Legacy of a Bullet Warrior
Haralambos Tsakiris is not your typical FIDE Master. He is a streaming-era crusader who treats every blitz game like a world championship match and every bullet game like a playground brawl. His peak blitz rating of 2774 proves that his unorthodox methods work, and his 2674 bullet peak shows he can push pieces at warp speed.
Whether he is battling nebrabp for the 49th time or unleashing a new gambit on an unsuspecting opponent, one thing is certain: Haralambos never gives less than everything. He is a reminder that chess is not just about playing the right moves, but about playing the moves that scare your opponent the most. And in that department, he is undefeated.