How to Build a Chess Opening Repertoire: 3 Grandmaster-Tested Methods

Method 1: Improve on Games by Great Players

Colovic's first method starts with a simple insight: elite players don't play bad openings. When a strong player loses from the opening, the variation itself is usually sound - they just made a specific mistake or missed an improvement. That mistake is your opportunity.

In the 1990s, Colovic was looking for a reliable weapon against the English Attack in the Najdorf Sicilian. The English Attack - Be3, f3, Qd2, long castle, and a kingside pawn storm - was everywhere. Everyone had a system against it, but Colovic wasn't satisfied with the chaotic, heavily theoretical main lines.

Then he found a game between Walter Browne and Bobby Fischer from a 1971 blitz tournament in New York. Fischer had reached a critical position where theory (even in the 1990s) dictated the move ...b4, leading to wild complications. Fischer played the quieter ...Nh5 instead - a move condemned by contemporary theory.

Fischer lost the game. Theory moved on and forgot about the line.

But Colovic looked closer. He realized Fischer's position wasn't bad because of the opening - it was bad because of one specific follow-up move. The resulting light-square weaknesses were a consequence of that choice, not the variation itself. Colovic found a simple improvement that sidestepped the problem entirely - neutralizing White's attacking idea while creating concrete counterplay.

He started playing this improvement. Because the variation was obscure and "theoretically bad," nobody prepared against it. He had both a psychological edge - opponents were caught off guard - and a practical edge - he had analyzed the resulting positions deeply while his opponents were seeing them for the first time.

The line served him well for over a decade. It eventually reached the elite level, appearing in Candidates tournament games between Caruana and Mamedyarov. By then, Colovic had already extracted years of value from a single improvement on a Fischer game.

The principle: Don't just study master games to copy moves. Study them to find moments where a strong player went wrong - and ask whether you can do better.

Watch the full analysis: GM Colovic walks through Fischer's game move by move and explains the improvement that became a cornerstone of his Najdorf repertoire.

Method 2: Pick Up Ideas from Chess Friends

Not every opening discovery comes from solitary study. Colovic's second method is more social: a hint from a friend can spark an entirely new direction in your preparation.

For years, Colovic played 3.Nc3 against the French Defense. It worked - until theory ballooned. The Winawer, the Classical, the Rubinstein - all three main systems were getting deeper and more demanding. Keeping up with the theory in all of them was becoming impractical.

Then, during a tournament, his friend GM Misha Popovic from Serbia started telling him about an aggressive gambit line in the Advanced French. After 1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6, Popovic was playing the surprising 6.Bd3 - a move considered dubious because Black can win a pawn after the central exchange. But after castling and the follow-up Nbd2, White gets a ferocious initiative. The pawn sacrifice buys a powerful blockade square on d4 and rapid development that generates pressure on both flanks.

Colovic investigated the line and discovered it was full of fascinating ideas - dangerous for Black, theoretically underexplored, and far from mainstream preparation. He expanded from the gambit into the entire Advanced French variation, which gave him a practical, low-maintenance system where White dictates the structure instead of allowing Black to choose.

The broader point is about chess culture. Good ideas circulate among players who trust each other - over a post-game coffee, during a shared cab ride to the hotel, in messages after a tournament. A single conversation can redirect hundreds of hours of productive study.

The principle: Surround yourself with players who think about chess differently than you do. One offhand suggestion can become a decade of preparation.

Watch the full breakdown: GM Colovic shows the gambit lines his friend introduced and how they reshaped his entire approach to the French Defense.

Method 3: Get Inspired by Books and Players You Admire

Colovic's third method flips the usual approach to opening study. Instead of choosing an opening and then learning the resulting positions, start with a type of position you understand and enjoy - then find the openings that reach it.

The catalyst was GM Sergei Tiviakov's book Rock Solid Chess. Colovic had known for years that Tiviakov favored the Alapin Sicilian (1.e4 c5 2.c3) and the Tarash variation against the French - both systems that aim for a specific pawn structure with three White pawns against two on the queenside (a, b, c vs. a, b). But he'd never thought deeply about why Tiviakov liked these positions.

The book changed that. Tiviakov explained with unusual clarity the strategic principles behind these structures: which pieces to exchange, which to keep, where the long-term pressure lies, and how to convert the queenside majority into a real advantage. It was a level of positional understanding that takes most players years to develop on their own.

Colovic was sold. He set out to find lines in the Alapin that would reach these favorable structures - but specifically avoiding the typical isolated queen's pawn (IQP) positions that most Alapin players aim for. He discovered that the move Na3, relatively uncommon at the time, was a recurring resource that steered play toward his target structure. The resulting positions were sound, practical, and unfamiliar to opponents.

Today, the Alapin is played by virtually every top player - Carlsen, Nakamura, Kramnik. The lines Colovic explored before they were fashionable are now part of modern theory.

The principle: Understanding comes before memorization. When you deeply understand a type of position, choosing openings becomes a matter of taste and navigation - not a memorization arms race.

Watch the full exploration: GM Colovic traces his journey from reading Tiviakov's book to building a complete Alapin Sicilian repertoire around a single positional idea.

The Missing Piece: Drilling Your Repertoire with the Woodpecker Method

All three of Colovic's methods share a common thread: they produce deep understanding and carefully chosen lines. But understanding alone doesn't win games. Under time pressure, with the clock ticking and your opponent playing confidently, you need your preparation to be automatic. You need to have drilled it until the moves come from instinct, not calculation.

This is where the woodpecker method comes in.

The woodpecker method was originally developed for tactical training by GM Axel Smith and WIM Axel Getz. The core idea is deceptively simple: solve the same set of problems repeatedly, across multiple cycles, with the goal of increasing speed each time. The first pass is slow and analytical. By the third or fourth cycle, pattern recognition takes over - you see the solution before you've consciously calculated it.

At Disco Chess, we've adapted the woodpecker method for opening training. Instead of solving tactical puzzles, you drill opening lines - the same lines, across multiple repetition cycles - until the correct moves become second nature. Here's how it works:

• Structured courses built by titled players. Most opening books on Disco Chess are curated by titled players - exactly the kind of deeply understood, carefully chosen preparation that Colovic describes. GM Colovic himself authored multiple courses on the platform, including Nimzo-Indian Defence for Beginners and Semi-Tarrasch for Beginners. Explore the full opening course library.

• Repetition across cycles. You don't study a line once and move on. You drill the same set of lines across multiple woodpecker cycles, building speed and reducing hesitation with each pass.

• Spaced review of mistakes. When you play a wrong move, it enters the mistake review queue - a spaced repetition system that resurfaces it after 1 day, then 3, then 7, then 14, then 30 days. Mistakes aren't buried; they're revisited until corrected permanently.

• Video explanations for every chapter. Each chapter in an opening course can include a video explanation, so you understand the ideas behind the moves before you start drilling. This mirrors Colovic's emphasis on understanding over memorization.

The combination is powerful. You build your repertoire using grandmaster-level understanding, then lock it into long-term memory through woodpecker-style repetition. When you sit down at the board, you aren't trying to remember what you studied last week - you're playing moves you've drilled dozens of times across multiple cycles.

Build It Right, Then Make It Automatic

GM Colovic's three methods give you a framework for choosing opening lines that genuinely suit your style and understanding:

1. Improve on master games - find hidden potential where strong players went wrong
2. Listen to chess friends - let a single good idea from a trusted source spark deep exploration
3. Start from positions you love - understand a type of position first, then find the openings that reach it

These methods produce repertoire choices that last - not because you memorized more moves than your opponent, but because you understand the positions better.

The woodpecker method, adapted for opening training on Disco Chess, is how you turn that understanding into automatic, pressure-proof play. Study the ideas. Drill the lines. Review your mistakes. Repeat until it's instinct.

Your repertoire isn't a list of moves to memorize. It's a living system - built on understanding, sharpened through repetition, and uniquely yours.