Decoding IM Valeri Lilov's Defensive Video Series: An Opening Map and the Question of Trust

Summer 2026. I was sitting in the analysis room of Sanna Khanh Hoa BVN club in Nha Trang, a chess game unrelated to football glowing on my monitor. Beside the keyboard, my hand rested next to a notebook dense with coordinate figures. That was the moment I discovered the principle that would later define my working method: the most important decision is not the move on the board, but the move about to happen — the square a piece will occupy three moves from now.

At the same time, in another corner of the chess world, a similar problem was being posed. After 1.d4 d5, more and more club-level White players refuse to play 2.c4 — the move that opens the entire theoretical universe of the Slav, Semi-Slav, Queen's Gambit and Orthodox Queen's Gambit. Instead, they choose "theory-dodging" systems such as the Colle System, Trompowsky Attack, Torre Attack and London System. For Black, that is an uncomfortable problem: you prepare for a theoretical battle, and your opponent drags you into a different fight.

That is where IM Valeri Lilov appears with a six-video series inside "Power of Initiative", promising to arm Black with practical plans against each system. The question I posed was not whether the series is useful — but whether the "extremely dangerous" framing the author constructs honestly reflects the tactical nature of these systems, or is simply a familiar marketing device in the opening content market.

Context: The theoretical map of 1.d4 d5 and the overlooked gap

To understand why a video series about systems like the Colle or the London has a market at all, we need to redraw the theoretical map of 1.d4 d5. This is one of the oldest opening structures in modern chess, and also where the largest theoretical body has accumulated since Steinitz.

When White plays 2.c4, the game enters Queen's Gambit territory. Black can accept with 2...dxc4 (Queen's Gambit Accepted — QGA), decline with 2...e6 (Orthodox Queen's Gambit), or choose a Slav structure with 2...c6 or a Semi-Slav with 2...c6 and ...e6. Each of these branches generates thousands of pages of theory analysed to exhaustion by engines. At the professional preparation level, memorising accurately to move 25 is routine.

But most club-level players have neither the time, the memory, nor the need. They gravitate toward systems with clearer structure, less dependence on theory, and middlegame plans understandable from the first pawn move. The Colle, Trompowsky, Torre and London all sit in this group. It is a real trend, not a passing fad.

What is notable is how the source article describes these systems. It writes that "many players have had the painful experience that the Colle System, the Trompowsky Attack, the Torre Attack and the London System are nevertheless extremely dangerous". This is an emotionally loaded opening sentence, but it offers no data to substantiate the degree of danger. In serious chess analysis, such a claim needs verification through win rates, ACPL (Average Centipawn Loss), or at least a few standout games at elite level. Here, none of that is provided.

To be clear: these systems are not "dangerous" in any objective sense. The Colle System has been considered passive because White locks the centre with e3 and signals a slow but solid intent. The London System has a stable structure, but at grandmaster level it is rarely seen as an ambitious winning choice. The Trompowsky and Torre are more disruptive structurally, but they also have clear counter-plans for Black when the opponent is well prepared.

In other words, the level of "danger" the source article assigns depends almost entirely on the quality of Black's preparation, not on any intrinsic property of the opening. For me, this is the most important detail to separate before analysing the product: which part is tactical assessment, and which part is marketing framing.

Seven systems under the tactical lens

The source article lists seven systems the series promises to cover: the Colle System, Trompowsky Attack, Torre Attack, London System, Catalan, Blackmar-Diemer Gambit and Richter-Veresov Opening. In six videos. The number itself says something about the depth of the content.

The Colle System is fundamentally a setup where White builds with Nf3, e3, Bd3, c3 and 0-0, controlling the centre with pieces rather than pawns. The typical plan is to push e4 after completing development, opening a tactical centre that can be uncomfortable if Black reacts passively. But the weakness is right there: if Black builds the right structure — usually with ...c6 and ...Nbd7, keeping the e6 pawn solid — White can end up short of space without a clear way to break through. For Black, the key is patience and understanding when to counter with ...e5 or ...c5.

The Trompowsky Attack begins with 1.d4 Nf6 2.Bg5. This deliberately avoids mainstream structures, directly questioning the d5 pawn and Black's piece setup. Black's counter-plan usually revolves around accepting exchanges to gain space, or declining with ...Ne4 to keep tension. The key point is that the Trompowsky does not give White a theoretical advantage; it only creates an asymmetry that unprepared Black players can be swept along by.

The Torre Attack — 1.d4 Nf6 2.Nf3 e6 3.Bg5 — is milder. It often transposes into middlegame structures resembling the London or Colle, depending on Black's response. Against a prepared Black player, the Torre poses almost no theoretical problem — it only demands an understanding of pawn structures to know when to push ...c5 and when to play ...d5.

The London System, the most popular of the group, builds with Nf3, Bf4, e3, Bd3, c3 and 0-0. Its advantage is that it can be used against almost any Black response, making it a "universal system" for club players. But the disadvantage is the same — universality comes with a lack of winning ambition. At elite level, the London is rarely used to seek a White advantage, more often to secure a safe game. For Black, the question is not "how to counter it", but "how to turn a stable structure into a counterattacking chance".

The Catalan — 1.d4 Nf6 2.c4 e6 3.g3 — is a different case altogether. This is a fully mainstream opening with deep strategic structures, not part of the "theory-dodging" group. Its appearance in the list raises a question about the series' consistency: if the goal is to counter White systems that avoid theory, the Catalan is not among them.

The Blackmar-Diemer Gambit — 1.d4 Nf6 2.Nc3 d5 3.e4 — is a highly sharp pawn sacrifice, but at club level it is often treated as a "weak player's gambit" because theory shows Black can equalise or better. Including it alongside the London and Colle suggests the series is designed around the criterion of "what club-level White players usually play", not "what is actually dangerous".

The Richter-Veresov Opening — Nf3, Nc3, d4, Bg5 — is the least common of the group, aiming at hanging pawns or Black's centre. It offers surprise value but no special theoretical strength.

Overall, the seven systems divide into three groups: "stable but unambitious" (London, Colle, Torre), "structurally disruptive" (Trompowsky, Richter-Veresov), and "mainstream theory or sharp gambit" (Catalan, Blackmar-Diemer). Lumping them together under an "extremely dangerous" label is a convenient marketing classification, but tactically inaccurate. If I were preparing for a tournament, I would want to know what each system demands of Black — a middlegame plan, a specific theoretical response, or simply patience.

Series structure and limits to recognise

Six videos for seven systems. Subtract the introduction and conclusion — almost mandatory in any instructional series — and each system receives roughly a few dozen minutes. For an opening like the London System, merely covering the main structures requires a thick book, let alone analysing typical middlegame plans.

I do not deny the value of such videos. For a club player struggling against the London System, a 30-minute video with a clear plan can be more valuable than a book chapter, because it gives them a concrete starting point. The issue lies in expectation: if a buyer understands they are purchasing an overview map, the value is proportionate. If they believe they are buying a full theoretical toolkit usable at elite level, the gap between expectation and reality becomes a problem.

Another detail worth noting is the source article's description of the content: "Lilov demonstrates a relevant plan for Black for each opening". The phrase "practical plan" indicates the focus is on structure and middlegame ideas rather than variation memorisation. That is a reasonable choice for the target audience, but it also means the series does not arm Black with a theoretical weapon strong enough against a computer-prepared opponent.

In a landscape where platforms like Chessable have accustomed users to opening courses with databases, engine analysis, and variations checked deep into the endgame, a six-part video series at introductory level needs clear positioning. That is not a flaw in itself, but a characteristic to recognise before purchase.

A counterintuitive angle: when the title does not match the content

The most notable technical detail of the whole product may lie in the title. The series is promoted alongside the Benko Gambit — a sharp opening starting with 1.d4 Nf6, where Black sacrifices a pawn for activity and long-term queenside pressure.

The problem: the Benko Gambit has nothing to do with the opening group the series actually covers. The Benko arises after 1.d4 Nf6, not after 1.d4 d5. The listed systems — Colle, Trompowsky, Torre, London — do not lead to a Benko Gambit in any move order. This is a title-content mismatch known in content marketing as "SEO anchoring": using a high-search-volume keyword to attract users, even when the actual content does not match.

I do not assume deliberate deception. It could be a decision by the distribution platform or the title author, not the instructor. But as an analyst, I must record it as a signal about the level of caution needed when evaluating the product. If a title does not accurately describe the content, other claims in the description also require independent verification.

This leads to a broader observation about the opening content market. At present, club-level chess players have countless free or near-free options: analysis videos on YouTube, courses on Lichess, personal blog posts. The differentiation of a paid IM-level product usually lies not in original content — most of it already exists — but in systematic presentation, clear structure, and the instructor's credibility. When one of those three is questioned, the product's value falls accordingly.

The chess content market and the trust problem

At market level, chess opening content has undergone a clear transition over fifteen years. From printed books by grandmaster authors, the industry moved to digital platform models with interactive courses, where users can train variations directly. Chessable and similar platforms have reshaped learner expectations: engine-analysed content, databases, verified variations.

In that context, IM-level products like Lilov's video series sit in a middle segment. They offer higher structural value than free YouTube content, but lower credibility and depth than grandmaster courses. The existence of this segment is rational — not everyone needs or can afford GM-level content, and not every club player needs that level of detail.

But there is a transparency gap. The source article provides no credential verification for Valeri Lilov beyond the label "Bulgarian trainer". No current rating, no tournament history, no student results, no platform reviews. For an instructional product, the instructor's credibility is part of the product value. The absence of verification creates a trust gap the buyer must fill through independent research.

Based on my experience tracking the chess content market, most IM-level video series operate on a "series" model: each episode covers one topic, and learners are encouraged to buy multiple episodes for the full picture. This is a rational business model, but it also means the true value of a single episode must be judged within the whole. The source article's failure to explain what "Power of Initiative" is, and why episode 21 should be trusted, makes it hard for a new reader to place the product.

The execution blind spot: when emotional analysis replaces data

Returning to my working principle — measure first, conclude after — one detail in the source article made me pause longer than necessary. It is the way emotional claims are presented as if they were technical assessments.

The phrase "extremely dangerous" applied to the Colle and London is one example. In chess analysis, to call an opening "dangerous", we need at least one of three data types: White's win rate at high level, strong-engine evaluation in main variations, or sample games showing White achieving strategic advantage. None appeared.

This is not the source article's fault alone. It is a systemic problem of the chess instructional content industry: too many products rely on subjective feeling and marketing framing to create urgency, rather than building arguments on verifiable data. As a researcher, I see a practical consequence: learners develop the habit of judging openings emotionally, then struggle when transitioning to data-driven thinking at higher levels.

If I had to offer a verified judgment on this series, I would say: it is likely useful for club players around 1400 to 2026 rating needing an overview map of defensive systems against popular White openings. It is unlikely to replace a GM-level course for players at 2200 or above. And it needs to be assessed through samples or user reviews before purchase, because the source article does not provide enough data to conclude.

Takeaway: where numbers have not appeared, trust must be verified

The lesson I draw from this analysis is not whether Lilov's series is good or bad. What matters more is how we read products like this. A six-part video series, a title that does not match the content, a string of emotional claims unverified by data, a distribution platform lacking transparency about instructor credentials — that is a set of signals telling learners to build their own filters.

In chess as in football, the true value of a system lies not in claims about it, but in your ability to understand why it works and when it collapses. A middlegame plan shown in a video is only useful when you can redraw it on the board without looking at the screen.

And perhaps the most worthwhile point lies here: if a course truly wants to deliver long-term value, it must teach learners to evaluate openings by measurable criteria — not merely by the feeling that an opponent holds a secret weapon. In the end, the decisive piece on the board is not the system you choose, but the understanding you bring to each move. And that understanding is only built when we measure before we conclude.