The Bayonet Attack, 9...a5 and the Data Gap of a Chess Antidote

A headline speaks of Round 2 of a team event held in Samarkand. Directly beneath it, the entire body of the text discusses a chess DVD against the Bayonet Attack in the King's Indian Defense. Two unrelated texts packaged into a single file. I read it three times before writing and once more after finishing, the way I have reminded myself for years in this trade: let the number be a witness, not a judge. This time, neither half of the package qualifies as a witness. One half mentions an event that never appears in the rest. The other half describes a commercial product with not a single game, not a single author name, not a single evaluation figure.

I am not writing this to sell the DVD, nor to dismiss it. I am writing to put on the scale a question the chess world rarely asks outright: when an opening-theory product calls itself the antidote to a popular line, how much evidence do we actually have?

The King's Indian: a choice with a price

The King's Indian Defense begins 1.d4 Nf6 2.c4 g6, with Black placing the bishop on g7 and conceding the center before counterattacking. It is one of the purest hypermodern systems still alive at the top level. In the Mar del Plata variation, Black plays ...Nc6 and ...e5, accepts a locked center, and both sides launch a race on opposite wings: White pushes pawns on the queenside, Black masses pieces on the kingside. The line falls roughly under ECO codes E97 to E99, and that classification is mine, based on cataloguing practice rather than any line in the sales pitch.

The Mar del Plata has never been a cheap choice. It demands that Black memorise a large block of forcing lines in the opening phase, and accept that a single mis-timed move can collapse the position within a few moves. In an era when engines have entered every home, carrying such an open system becomes a calculated gamble. There are forgotten players, but data never forgets them. Data also never forgets openings abandoned not because they are wrong, but because they demand too much memory.

The Bayonet Attack: a strike at the structure

The Bayonet Attack is White's 9.b4 in the Mar del Plata. The motive is concrete: White pushes the b-pawn, opens the diagonal for the bishop to b2, and grabs queenside space before Black can organise an attack. It forces Black to answer immediately, and that answer must be precise.

Black's main move for decades has been 9...Nh5. Black puts the knight on the rim, prepares ...f5, and turns the game into a race: whoever strikes first, wins. The line is called the main line not because it is absolutely stronger, but because it forces both sides to remember. It turns the game into a calculation contest, where every move is checked by databases and engines.

The question every Black player asks is the same: is there another road, one that requires less memorisation?

Two answers, two philosophies

The product in the document I read proposes 9...a5. This is a move already known in practice, not a new invention. It does not aim to open the position but to close it: Black attacks the b4-pawn, refuses the speed race, and drags the game into a long positional fight.

The difference between the two choices is philosophical more than technical. 9...Nh5 says to White: I will calculate with you. 9...a5 says: I will not calculate with you, I will play chess.

The key point: the sales pitch never claims 9...a5 is theoretically stronger. It claims the chances are balanced, and that the value lies in Black being able to play without memorising. That is a claim about practicality, not about advantage. The distinction matters, because the opening-theory market routinely blurs the two in order to sell.

Anatomy of a sales pitch

The pitch rests on three pillars. First, the contrast between the two lines: 9...Nh5 opens the position, forces the lines, and makes computer analysis important again; 9...a5 leads to sound positions with very few concrete lines. Second, the audience: players who prefer to think for themselves rather than memorise. Third, the promised outcome: if Black knows what he is doing, the position can quickly become dangerous for White.

All three pillars sound tight. But all three are qualitative claims. No move, no game, no engine evaluation is offered in support.

That creates a gap. A buyer has no way to judge whether 9...a5 truly leads to fewer concrete lines than 9...Nh5, whether it is genuinely balanced, or whether it survives against a prepared White player.

The data gap

Across the entire document I have, four categories of minimum data are absent.

No author name. For an opening DVD, the author's identity is the single most important piece of evidence. A grandmaster with results in the Mar del Plata says one thing; someone who has never played the line at a high level says another. I have no basis to tell them apart.

No sample games. Not a single game from practice or training is cited to show the line works.

No engine evaluation. No value, no average centipawn loss, no win rate, no draw rate.

No novelty claim. The pitch itself admits 9...a5 is known, treating it only as a reasonable sideline. That honesty is worth noting, but it also means opponents have had time to prepare.

I once trusted feeling, until a number knocked at 3 a.m. This time no number knocked. Only the silence of four absent categories of data.

The contrarian angle: the engines changed, the story did not

The third pillar contains a telling detail: the claim that computers often do not know how to handle such complex strategic positions.

That phrasing belongs to the pre-AlphaZero era. In the current neural-network generation, long-term, strategy-heavy King's Indian positions are handled far better than the sentence implies. Engines no longer get lost in closed structures; they evaluate long-term compensation normally.

What is interesting is that the claim may still help the seller, in a different way. It positions the product against free tools. If you believe engines do not understand these positions, you believe you need a human to explain them. That is a market advantage, not a technical fact.

At a deeper level, the story reflects a real anxiety in the amateur chess community: the feeling that machines have taken the soul out of the game. The product exploits that anxiety rather than resolving it.

Who actually buys

The pitch aims squarely at one audience: people who like to think for themselves, who dislike memorising. This is an identity-based sales angle, not a results-based one.

That audience exists. Club players and lower-rated international masters are the most plausible beneficiaries. They do not have hundreds of hours to cross-check databases, and a system that lets them play by principle rather than by memorised line has genuine practical value.

But that value has limits. At the top grandmaster level, a known sideline will be answered within one theory cycle. Someone simply checks the database, finds an improvement, and turns the antidote into an ordinary game.

The gap between buyer expectation and real outcome sits exactly there. The club-level buyer gets a useful tool. The buyer who fantasises about making White suffer will be disappointed.

The risk is not on the board

With a commercial product like this, the risk is not losing a tournament. The risk is wasted study time.

The largest risk is theoretical obsolescence. A single line can be neutralised once the opposing side analyses it. In a branch as well-trodden as the Bayonet, that probability is high.

The second risk is inflated expectation. Absolute language in marketing is a typical signal of expectation being pushed beyond reality.

The third risk is duplication. Much of the content of such a DVD is usually a recompilation of already-published theory, while databases and free tools are readily available.

When the stadium is empty, the true value of a person begins to speak. The same holds for an opening DVD: once the noise of advertising fades, the only remaining question is whether it helps a player understand the game better.

The opening-theory market: a steady current

Based on my years tracking the theory market, this is one of the steadiest and least glamorous revenue streams in chess. Products sell answers to popular lines. When a line rises, the market responds with a product that answers it, often within the same season.

Transmission from this layer to the others is weak but real. It seeds study material into clubs, into coaching sessions, and occasionally into online libraries. No measurable commercial signal exists from the outside, so its influence is anecdotal.

What stands out is that the product competes directly with free tools. It survives not on its lines but on its storytelling and deliberate structure. Strip away the storytelling, and what remains is usually nothing new.

Signals worth tracking

I do not judge an opening product by feel. I track it through four signals.

First, the appearance of 9...a5 in top-level classical games. If it shows up in games at the 2700 level or above, the product's promise is confirmed or refuted by real data.

Second, the frequency of the Bayonet Attack 9.b4. If the line remains fashionable, the product's relevance window stays open. If it fades, the antidote's reason to exist fades with it.

Third, source integrity. The document I read has a headline about Samarkand and a body about a DVD. Locating the original text and reconciling the two is a prerequisite before citing anything from it.

Fourth, author identity. When a name with results in the Mar del Plata appears, the pitch shifts from an unverifiable claim to assessable content. That is the only turning point that could change this article's entire conclusion.

Closing

I light a candle for data. But I always let the flame of feeling illuminate the question.

The Bayonet Attack will remain a popular line, because it poses a real problem for Black. The Mar del Plata will remain a calculated gamble, because it does not allow a player to hide behind general principles. And 9...a5, however it is sold, remains a side door in a large building.

Its value is not that it is stronger. Its value is that it demands a different kind of player. Whether that kind of player is numerous enough to keep the door open is not answered by a DVD, but by the games to be played in the months ahead.