Sebastian Alonso Ortiz Menacho: Sebas23OM, FIDE Master and Blitz Battler
Sebastian Alonso Ortiz Menacho, known online as Sebas23OM, is a FIDE Master who has made online Blitz his personal battlefield. His preferred time control is Blitz, and the numbers show why. Starting in the low 1000s in 2020, he climbed relentlessly through 2023, then exploded in 2026 with more than 1,200 analyzed games and a Blitz peak of 2516 (2026-09-16) in September of that year.
Along the way, he earned the FIDE Master title from FIDE, built a loyal online following, and developed a style that is sharp, stubborn, and surprisingly endgame-heavy for a Blitz specialist.
A Repertoire Built on 1.e4 and the Sicilian Jungle
Sebastian is a 1.e4 player at heart. In 2026, he opened with the king pawn in more than 80% of his games. As White, he scores heavily against the Caro-Kann Defense and the Scandinavian Defense, and he loves diving into the complications of the Sicilian Defense.
As Black, he is a Sicilian specialist. The Alapin Variation of the Sicilian has been especially kind to him, with a 70.4% win rate in Blitz, while the Accelerated Dragon gives him another sharp weapon. In Bullet, he enjoys experiments such as the Amar Gambit and the Barnes Defense, which keeps his opponents guessing.
A typical Najdorf setup from his White repertoire looks like this:
Rivalries and Familiar Faces
No online career is complete without rivals, and Sebas23OM has a few. His most frequent dance partner is RoquePinto, who leads their 34-game series 18 wins to 10, with 6 draws. That rivalry has clearly pushed him to improve.
There is also Henry Deng, who holds a perfect 6-0 record against him, and Mike Sailer, who has had the opposite experience, losing 7 of their 8 meetings. Every one of those battles has helped shape his fighting identity.
Streaks, Comebacks, and Clock Magic
Sebastian's longest winning streak is 10 games, but his longest losing streak is 9, so he knows both sides of the mountain. The key stat is his comeback rate of 85.94%, meaning that even when things look grim, he finds a way back. He still wins almost 47% of the time after losing a piece, and his one-sided loss rate is just over 1%.
Blitz is a game of clocks, and he has mastered that too. He wins by timeout 202 times while losing on time only 152 times. His games are long and grinding, with wins averaging nearly 74 moves, and 75% of his games reach an endgame.
Fun Facts and Scheduling Tips
- His best day of the week is Monday, with a 60.8% win rate, while Saturday is his toughest day.
- His best time to play is 12:00, so set your lunch break accordingly.
- He wins 75% of his games against opponents rated at a similar level.
- He has delivered over 2,900 checks in analyzed games, and his most common checking piece is the queen.