King’s Indian: From Bayonet to 9...a5, an Antidote or a Risk-Profile Switch?

On a winter evening in Saint Petersburg, I opened the promotional package titled Svitlana's Smart Moves – King's Indian Attack at the Olympiad. The cover carried a familiar promise: an antidote to the Bayonet Attack, a way to play the King's Indian without memorising long lines. I opened a database and looked for a named Olympiad game, a specific player, an engine evaluation. There was none. The title says King's Indian Attack; the body leads the reader into the King's Indian Defence, Mar del Plata branch. When the stadium has no ball, memory begins to score; in chess, when the board has no named game, the reader has to rebuild memory alone. The King's Indian Defence is a familiar hypermodern system: Black concedes the centre, then counterattacks with ...Nf6, ...g6, ...Bg7, ...d6 and ...e5. In the Mar del Plata Variation, both sides enter a two-wing race. White pushes b4, the Bayonet Attack. Black has two major choices. One is 9...Nh5, the fashionable, forcing line that demands deep memory and constant updating. The other is 9...a5, a classical pillar, less forcing and more plan-based. Svitlana's product chooses 9...a5 and calls it an antidote to the Bayonet. The given move sequence stops at 7.O-O; to understand 9.b4, the reader must infer that 7...Nc6 8.d5 Ne7 follows. That is a small technical gap, but a meaningful one for a buyer who wants verification. The chess opening market works like a small bazaar. The transfer market is where people sell the future to buy hope. Here, what is sold is relief from a body of theory inflated by engines. Based on my experience watching games, I see many club players between 1800 and 2300 Elo tired of 9...Nh5 lines that must be remembered move by move. They want a system they can play through understanding. The product targets that need correctly. But two things must be separated: the need is real, while the claim of an antidote is unproven. The promotional text names no illustrative game, no player, no ACPL, no engine match rate, no Stockfish NNUE or Leela evaluation. It only says 9...a5 is sound, has few concrete lines, is strategic, and is roughly equal. The core point is that 9...a5 is not a new invention. It has long existed in Bayonet theory. The product does not sell a new move; it sells a risk-profile switch. From a forcing, memory-dependent line to a strategic, understanding-dependent one. The claim that computers often do not know how to handle these positions is outdated. Modern NNUE engines evaluate closed, plan-based positions quite well. The honest version is: human opponents are less likely to have memorised a precise, engine-checked path to an advantage. That is an argument about human memory, not about machine weakness. When selling a system, the real product is reduced memory load, not a weaker engine. Two statements in the promotional text pull against each other. One says objectively the chances are equal. The other says things may quickly become dangerous for White. They are compatible only if the reader understands equality as an objective evaluation and danger as practical scoring probability. That is a practical promise. Against a well-prepared Bayonet player, 9...a5 does not automatically create an advantage. Against an unprepared one, it may create psychological pressure. The product does not say this clearly. Nor does it say that Black must accept queenside spatial concession and a structural decision on the a-file. That cost is the blank space in the promotional text, even though it determines the system's real value. The blind spot of collective memory is that we remember 9...Nh5 as the symbol of the engine-era Mar del Plata, then forget that 9...a5 was once a pillar. When a fashionable line takes all the light, the classical line looks like a new solution. It is not new. It is simply less practised. That is why the product can be useful: it sells practice, not discovery. But for the same reason, the biggest risk is that the buyer believes there is an advantage while the opponent knows 9...a5 better. A Bayonet player with a database, an engine and time will not be surprised by public theory. Theory may stop beating in analysis rooms, but the heart stops beating, the heart still beats: old plans remain alive in practical play, provided the player understands them. The title has another crack. The Olympiad appears only on the cover. No game, no round, no year, no player. For an instructional product, credibility usually comes from the presenter and the illustrative games. The promotional text supplies neither. It also does not say which engine was used, how current the database is, or which specific 9...a5 sub-line is recommended. The 9...a5 complex contains several different setups; one antidote label cannot cover them all. The buyer should treat this as advertising, not technical review. They should check the first 15 to 20 moves with a current engine and database, then test the resulting structures in practice games. Used correctly, the product can be a useful plan library for a club-level King's Indian player. It does not erase theory, replace calculation, or turn 9...a5 into a secret weapon. It only reminds us that some lines are chosen by maintenance cost, not by nominal evaluation. The useful lesson is the method: choose the line you can understand, not the line that is fashionable. When the board has no move left, memory begins to calculate. And an opening system is trustworthy only when the player knows whether they are buying a plan or buying a promise.