Koen Leenhouts (SCIM): The Grandmaster Who Never Met a Clock He Couldn't Ignore
Player Overview
Koen Leenhouts, known online as SCIM, is a FIDE Grandmaster with a deep affection for complicated positions and a suspiciously large amount of free time. Although his preferred time control is bullet, his statistics tell a different story: his empire is built in the blitz arena, where he has ground out over 2,700 wins across nearly 5,700 rated games.
His rating arc from the mid-2010s to the late 2020s is a monument to persistence, with a blitz peak of 2831 (2026-08-13) and a trajectory that keeps climbing like a player who refuses to log off. His opening tastes lean sharp and ambitious: the Sicilian Defense appears everywhere, the Grünfeld Defense supplies the dynamite, and the Catalan Opening gives his white pieces a comfortable stage.
Playing Style and Survival Instincts
SCIM plays chess like it is a full contact sport. His average winning game runs over 77 moves, and his endgame frequency hovers near 84%, so he is clearly not afraid of a long night. He rarely resigns early, and when he loses, it is seldom a one-sided affair. His comeback rate of 88.54% means he treats a lost position as merely an invitation to complicate things.
- White pieces: wins 51.3% of the time, frequently via the Slav Defense Bonet Gambit or a well-timed Catalan.
- Black pieces: comfortable in sharp Sicilian structures, including the Alapin and Taimanov lines.
- Survival rate: wins 46.9% of games even after dropping a piece, which is not supposed to happen at grandmaster level.
- Best time to play: midnight. His tilt factor is 12, which is tough to argue with.
Rivalries and Familiar Faces
No portrait of SCIM is complete without mentioning Glen De Schampheleire, his most frequent opponent. They have battled 55 times, with Koen holding a narrow but real edge: 28 wins, 10 draws,and 17 losses. This is the kind of rivalry that fuels entire opening repertoires.
Another recurring partner is Alan Stein, where SCIM leads 14 wins to 13, with 2 draws. He has also traded blows with SteelSpider and Daniel Taboas Rodriguez, proving that in his world, familiarity breeds ambitious prep rather than comfort.
Legacy
SCIM is what happens when a titled player decides that the real leaderboard is the one at 3 a.m. He is a warrior of volume, a hoarder of endgames,and a comeback artist who makes horror movie villains look like quitters. Whether playing bullet for fun or blitz for glory, Koen Leenhouts always leaves the board with a story, a fortress, or both.