Marek Karas: Slovak_fighter2000
Marek Karas, better known online as Slovak_fighter2000, is a FIDE Master who treats the chess clock like a personal challenge. His preferred battlefield is blitz, and his stats tell the story of a player who simply cannot stop playing.
The Slovak Blitz Machine
Marek has played more than 21,000 rated blitz games and more than 21,000 rated bullet games, for a combined total of over 43,000 games of pure online warfare. If chess were a marathon, he would be the runner who asks for extra laps.
His blitz rating has climbed from around 2,325 in 2017 to over 2,600 in 2026, with a peak of 2830 (2025-10-01) along the way.
A Repertoire Built for Speed
Marek is a d4 player at heart. His first move statistics are dominated by 1.d4 and 1.Nf3, and he is happy to outlast opponents in slow positional battles that suddenly explode into tactics.
When opponents try to steer him into familiar theoretical lines, he is ready. He has deep experience against the Caro-Kann Defense and the French Defense, and his online stats show a soft spot for sharp sidelines like the Amazon Attack: Siberian Attack.
Rivalries at Internet Speed
No player reaches this volume without picking up a few rivals. Marek's most frequent opponent is Anselm Wagner, with 153 meetings between them. It is a balanced and intense rivalry, with Marek winning 74 of those games.
He has also crossed paths with Jakub Pulpan 146 times, and while pulpanj has enjoyed the upper hand in 100 of those games, Marek keeps coming back for more. That is the Slovak fighter mentality.
Resilience and the Long Game
The numbers suggest Marek is at his most dangerous when the game seems lost. His comeback rate is 88.24%, and his longest winning streak reached 21 games. He also knows what a cold streak looks like, with a 19 game losing streak, but he always returns to the board.
He is not afraid to play deep into the endgame. His games often last around 90 moves, and his most common checking piece is the rook. Translation: he likes open files, active pieces, and opponents who have to defend forever.
When to Catch Him
If you want to face Marek at his sharpest, the data suggests midnight is his magic hour. His best win rate by hour of day comes at 00:00, so bring coffee and a good connection.