Fight the French Defense – A Repertoire by GM Luis Supi + PGN June 16, 2026

Fight the French Defense — A Repertoire by GM Luis Supi

A bishop that never belonged on b5 — until now

Some ideas survive a century of theory precisely because nobody thinks to question them. The bishop’s natural squares in the French Advance are d3, e2, and occasionally b5 only after the pawn structure has settled. In Fight the French Defense — A Repertoire, GM Luis Supi asks a simpler, sharper question: what if the bishop arrives on b5 before White has even played d4? The answer reorganizes an entire branch of the French around a single, unexpected move.

What makes the repertoire different

The repertoire is built on a move order rather than a single line. After 1.e4 e6 2.Nf3 — innocuous enough, since White retains every transposition into familiar Advance territory — Supi steers the game toward 2…d5 3.e5 c5 4.c3, and only then unveils the point: 5.Bb5!? against 4…Nc6. The bishop sortie is not a gambit or a trick; it is a structural reframing that poses fresh strategic problems Black has had no reason to prepare for.

What gives the idea its weight is that the move order does double duty. Reaching the same structures with the knight already committed to f3 quietly removes some of Black’s most reliable counters in the main lines — including recent fashions such as the early …Qa5 plan seen in Jordan van Foreest’s games. Supi’s verdict, after his own analysis, is that there is simply no clean equalizing route for Black here. The work covers the principled tries in turn: the critical 4…Qb6 complex (which Supi notes accounts for the majority of the French), the solid-looking 4…Bd7, and the main path with 4…Nc6 5.Bb5.

Author and inspiration

GM Luis Supi traces the idea to a practical source rather than an engine line. He first encountered the bishop sortie in a game by his friend GM José Martínez Alcántara, was intrigued enough to analyze it independently, and came away convinced the move was deeper and more durable than its modest appearance suggests. A second, practical benefit runs through the course: players who already favor the Advance Variation can implement this move order into an existing repertoire without learning a new system from scratch.

Map of variations

1.e4 e6 2.Nf3 d5 3.e5 c5 4.c3

4…Nc6 5.Bb5!? — the main recommendation; fresh strategic problems with the bishop on b5

• 5.d4 — transposes to the standard French Advance, sidestepping recent …Qa5 ideas (not the repertoire’s choice)

4…Qb6!? — a principled try, met with an independent fresh suggestion

4…Bd7 — playable, but concedes the entire Qb6 complex; handled with its own dedicated treatment

What’s inside

• 4 theoretical chapters
• 8 exercises
• 10 test positions
• 6 model games
• Memory Booster
• Video instruction
• Multilingual PGN availability (English, German, French, Spanish)