Seven Systems, Six Videos, and a Gap Named Catalan

Twenty minutes before the game at the Da Nang chess club on Thursday evening, I sat behind a twenty-two-year-old player and watched him set up his pieces. He told me he faces the London System every week, and every week he loses in the same way. Thirty-four moves later, he lost. There was no blunder in the game, no hanging piece, no mistake that made onlookers draw breath. He simply drifted: losing square by square, file by file, then the game.

That same week, a promotional document spread quickly through international chess groups. International Master Valeri Lilov, a Bulgarian trainer, introduced a six-part video series teaching Black how to meet seven opening systems that White uses to sidestep mainline theory after 1.d4. The pitch landed exactly on the wound of that student: many club players, some with ten years at the board, suffer when they meet these openings and do not know what to do.

I am not writing to sell, nor to disparage a specific product. I am writing because the question behind it matters more: when your opponent avoids theory, what do you study?

Context: seven systems inside six videos

After 1.d4, White declines 2.c4, thereby avoiding the entire body of Slav, Semi-Slav, Queen's Gambit Accepted and Orthodox Queen's Gambit Declined theory. The author calls that choice "not very ambitious." A few lines later, the same author calls these systems "extremely dangerous."

Those two sentences sound contradictory. In chess, they are not. The danger in quiet systems is not an objective advantage for White, but the fact that White gets a riskless game while Black drifts. A Black player who does not know the characteristic plan will make reasonable, legal moves and lose. That is exactly what happened to my student in Da Nang.

The list of seven systems, with Encyclopaedia of Chess Openings codes, is worth recording because it is useful independently of any product: the Colle System (D04–D05), the Trompowsky Attack (A45), the Torre Attack (D03, A46), the London System (D02), the Catalan (E00–E09), the Blackmar-Diemer Gambit (D00), and the Richter-Veresov Opening (D01). Seven names, six videos. The simplest arithmetic shows at least one video must bundle two systems, or one system is compressed.

The analysis: what is actually taught, and what is left behind

Three technical findings stand out.

First, the product belongs to the plans category, not the lines category. The source states that each video demonstrates "a relevant plan for Black" against a single opening. For players under 2026 Elo, teaching plans is often more effective than teaching lines, because plans are not forgotten after two weeks. But it should be said plainly: this is a mainstream approach, not a theoretical innovation. Nowhere in the material is there a novelty, an engine sample, or a scoring statistic.

Second, the difficulty gradient across the seven systems is steep. The Colle, Torre and Blackmar-Diemer can be handled with plans plus a dozen concrete moves. The Trompowsky and London demand accuracy against early ...c5, ...Ne4 and ...h6 ideas and against the trade of the dark-squared bishop. The Catalan demands a genuine repertoire decision: the open branch with ...dxc4 and ...b5/...Bb4+, or closed structures with ...Nbd7/...c6/...b6. The gap between the Colle and the Catalan is so wide that a single uniform product cannot be equally sufficient for both. Buyers are effectively paying for one strong module (London, Trompowsky) and several thin ones.

Third, and this is the most important technical point: the Catalan is not an anti-theory system. It is a mainline, and one of the most theory-dense mainlines of 1.d4. It arises once White has played c4 and Black has played ...Nf6, ...e6 and ...d5. It sits squarely in the theoretical category the source says White is fleeing. Grouping it with the Colle and the London is a taxonomy error, and one sixth of the runtime cannot carry its theoretical weight.

The Trompowsky has a comparable move-order problem. The Trompowsky proper (1.d4 Nf6 2.Bg5) occurs before Black commits to ...d5. A ...d5-first move order produces a different line in character, sharing only the label. The Blackmar-Diemer Gambit is a romantic gambit, not a quiet system; grouping it with the Colle and London mixes strategic categories.

There are also visible gaps. The Jobava-Prie London (1.d4 Nf6 2.Nc3 d5 3.Bf4), one of the most popular weapons in modern club chess, does not appear in the list. Nor do g3/Bg2 set-ups without c4. Whether they are covered in the videos cannot be determined, but their absence from the introduction is a signal.

On the presenter, the only verifiable attribute is the International Master title and the role of trainer. In the online course market, an author's title functions as a positioning signal: IM-authored products typically target club players, while GM-authored repertoires target the 2100-plus segment. No rating, activity or recent result data appears in the source, so the product's authority rests on pedagogical clarity rather than tournament results.

The contrarian angle: "dangerous" is a sales device

When the source calls these openings "extremely dangerous," it is telling half the truth. True at club level: a Black player without a plan will lose to the London and the Trompowsky. False at the level of objective evaluation: above 2200, where concrete knowledge dominates, these systems are no longer frightening in that way.

What stands out is the method of argument. The material cites no game at all. No win rate, no average centipawn loss, no engine sample. The only argument is that "many chess players have painfully experienced" these openings. At the scale of a single instructional product, the imbalance is small, but it is real: marketing heat materially exceeds the evidence supplied.

There is something interesting about the product's position. The "1...d5 plus plans" frame excludes the 2.c4 mainlines by design. The product does not claim to be a complete Black repertoire. That is a reasonable editorial choice, but buyers should read it correctly: they are purchasing the post-opening plan layer, not a lifetime theoretical reference.

What remains after the last page

Based on my experience watching club games, the market driver behind this product is genuine and durable. A new generation of players raised on video and engines has chosen openings that are cheap to memorise. Demand rose; supply followed. But the story still ends at a small board in a Da Nang club.

My student did not lose for lack of a course. He lost for lack of a checklist: when I meet a quiet structure, do I have a plan for where my pieces go over the next ten moves? That question can be answered for free, with one sheet of paper and thirty minutes before each game.

Courses like Lilov's can shorten those thirty minutes. They cannot replace them. And for a young player who has just lost three games in a row to the London, what is needed is not another video set, but one quiet evening asking: what do I want my Black pieces to become after move twelve?