Sebastien Feller

Overview

Sébastien Feller (born 11 March 1991) is a French chess Grandmaster (GM) representing the French Chess Federation. He earned both his International Master (IM) and Grandmaster (GM) titles in 2007. Feller achieved a career-high classical FIDE rating of 2668 in September 2011, reaching a peak world ranking of No. 77. Primarily a tournament and team player, his competitive career has included notable victories in national junior and open events, alongside representing France in international team competitions. His career progression was significantly affected by a cheating scandal at the 2010 Chess Olympiad, which resulted in a multi-year suspension from FIDE-rated events.

Biography & Major Career Milestones

Feller grew up in Thionville, France, and established himself as a prominent junior talent in the mid-2005s. In 2007, he finished as the vice-champion of the European Under-16 Championship and won the French Junior (Under-20) Championship in Le Grand-Bornand. He also claimed victory at the 22nd Le Touquet Open in 2007, the same year he secured both his IM and GM titles.

Feller’s rise continued with a first-place finish at the 1er Grand Prix de l'Essonne in Orsay/Évry in 2009, where he recorded a tournament performance rating of 2802. In July 2010, he won the Paris Championship with a score of 8/9 and an Elo performance rating of 2859. Later that year, he won the French Blitz Championship.

In 2010, during the 39th Chess Olympiad in Khanty-Mansiysk, Feller was implicated in an organized cheating scheme. An investigation by the French Chess Federation (FFE) revealed that Feller had received illegal assistance via a coded signaling system involving GM Arnaud Hauchard and IM Cyril Marzolo, who transmitted engine evaluations from France. Following appeals and disciplinary proceedings, the FIDE Ethics Commission in July 2012 suspended Feller from all FIDE-rated tournaments for a period of 2 years and 9 months. In 2019, a French criminal court sentenced Feller to a suspended six-month prison sentence for his involvement in the incident.

Upon the expiration of his ban in May 2015, Feller returned to active competition. He has primarily participated in European club leagues, regional open tournaments, and online events, notably winning a 24-hour charity online blitz marathon organized by the FFE in May 2020.

Elite Team & Event Performance

• Mitropa Cup (2007): Represented France, contributing to the team's gold-medal-winning performance.
• European Team Chess Championship (2009): Served as the first reserve board for France in Novi Sad, Serbia, scoring +4 =4 -1.
• 39th Chess Olympiad (2010): Played on Board 5 for the French national team in Khanty-Mansiysk, Russia. He scored 6/9 (+5 =2 -2). He was initially awarded the individual gold medal for Board 5, but this individual performance and medal were later disqualified due to the confirmed cheating violations.
• European Individual Chess Championship (2011): Played in Aix-les-Bains, maintaining a joint-second position (5.5/7) through the middle rounds of a strong field.
• French Club Championships (Top 16 / Top 12): Played for Vandœuvre-Echecs (making a single appearance in 2001/02 at the age of 11), Échiquier Niçois, and Évry Grand Roque, representing these clubs across multiple seasons.
• European Club Cup (2022): Played for the Luxembourg-based club Dudelange at the 37th European Club Cup in Mayrhofen, Austria, scoring draws against top-level grandmasters.

Playing Style, Material Tendencies & Endgame Profiling

Feller is a concrete, calculation-oriented player who developed during the transition into the modern engine-assisted era. He operates effectively in sharp, asymmetrical middlegames where tactical accuracy is prioritized over long-term positional safety.

Feller’s style is characterized by:

• Dynamic Imbalances: A willingness to accept isolated queen's pawns or doubled pawns in exchange for active piece play, open files, and immediate tactical threats.
• Active Counterplay: In inferior or defensive positions, Feller consistently seeks dynamic resources and counter-attacking tactical lines rather than adopting passive defensive setups.
• Endgame Conversion: He demonstrates solid technique in active rook endgames, emphasizing active king placement and the promotion of passed pawns, as well as managing complex queen-and-pawn endings.

Opening Repertoire & Theoretical Move Orders

Feller’s opening choices reflect a preference for concrete theoretical lines that demand highly precise calculation.

1. As White

When opening with 1.d4 or 1.Nf3, Feller steers toward classical setups, aiming to secure central space and long-term positional pressure. He also periodically plays 1.e4, utilizing closed lines.

• King's Indian Defense (Orthodox / Gligorić System): Feller routinely meets the King's Indian Defense with classical lines, focusing on Queenside expansion and central control.

• Bogo-Indian Defense: Against the Bogo-Indian, Feller accepts the trade of minor pieces, relying on central pawn majorities.

• Catalan Opening: Feller utilizes the Catalan to squeeze Black on the queenside, aiming for an enduring microscopic advantage.

• Closed Sicilian: When opting for 1.e4, Feller has frequently employed the Closed Sicilian to sidestep main line Open Sicilian theory and control the pace of the game.

2. As Black

As Black, Feller seeks solid but active defenses to generate counterplay, utilizing the Berlin Defense against 1.e4 and the French McCutcheon for asymmetric combat.

• Ruy Lopez, Berlin Defense: Against 1.e4, Feller's primary weapon is the solid Berlin Defense, which often leads to the theoretical "Berlin Wall" endgame.

• French Defense, McCutcheon Variation: In sharp, must-win, or double-edged scenarios, Feller employs the McCutcheon Variation of the French Defense, accepting structural damage to gain a bishop pair and active piece play.

• Queen's Gambit Declined (Slav and Exchange Setups): Against 1.d4, Feller relies on structurally resilient systems, aiming to control key central break squares.

Links

• FIDE: https://ratings.fide.com/profile/634654
• Wikipedia: https://en.wikipedia.org/wiki/S%C3%A9bastien_Feller