King's Indian: When 9...a5 Is Packaged as an 'Antidote' to the Bayonet Attack

In March 2026, when every tournament on the planet shut down, I sat in my Delhi apartment rewinding twenty old King's Indian games. The stadiums were empty that year, and I found tactical diagrams lying quietly under the seats instead of the roar of the crowd. And in that pile of footage, one move kept repeating in games I had once skipped past: 9...a5.

Three years later, an opening DVD appeared, packaging that exact move as an "antidote" to the Bayonet Attack. The seller promised something beautiful: turning the game from a storm of variations into a strategic stroll, where a player does not need to memorize, only to understand. After sitting through bloody King's Indian games from Amsterdam to Wijk aan Zee, I find that promise both true and expensive. And nobody labels the price.

Mistakes are not what frighten me; bending down to pick the footage back up at two in the morning is what makes a forecaster. What I picked up from that pile was not a miracle move but a question: when does a sideline become a weapon, and when is it just a sideline repackaged?

Context: why 9.b4 became a headache

The King's Indian Defense runs on a counterintuitive logic. Black concedes the center from the start — 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2 e5 — then smashes it with ...Nc6, ...Ne7 and the ...f5 push. That is the Mar del Plata, a branch named after the 2026 tournament in Argentina, where it first made the whole chess world bow its head and take notes. Its ECO codes sit between E97 and E99.

In the Mar del Plata, White usually seals the center with d5 and then chooses: attack the kingside or the queenside. From the early 1990s, a new choice emerged — 9.b4, the Bayonet Attack. White does not wait. White reaches into the queenside before Black can close with ...f5, threatening b5 and c5, forcing Black to answer immediately on a half of the board Black has not prepared.

The orthodox answer for decades was 9...Nh5. The knight leaps to the rim, opens the way for ...f5, and turns the game into a calculation race. After 9...Nh5 nothing is vague: 10.Re1 f5 11.Ng5 Nf6, and both sides charge at a speed where only the player who remembers deeper survives. That is the main line, not a sideline. Anyone preparing the King's Indian at a high level knows it.

That is precisely the weakness the product targets. Not that 9...Nh5 is wrong — it is still good. But the price of memory. Anyone who has sat across from an opponent who knows the first fifteen moves by heart understands the feeling: you do not lose because your chess is worse, you lose because you did not remember in time.

In India, where I have followed junior events for years, that fear is written on the faces of fourteen-year-old players. They may calculate better than the previous generation, but they enter games with a memorization list longer than any generation before them. A product that promises to shorten that list always has a market.

9...a5: a move that closes rather than opens

Technically, 9...a5 answers the Bayonet's spearhead directly. White has just played b4 to grab queenside space; Black pushes a5 to nibble the foot of that pawn before it can advance to b5. The position closes. The center stays shut. The kingside stays unopened. Both sides settle in for a long bargaining session in which nobody hurries.

What matters is that this is no new invention. 9...a5 is a known branch, something prepared players still meet in databases. The product does not sell a novelty — it sells a choice between two styles. And that is what I want to dissect, because the packaging is more honest than the content itself.

The difference between the two moves is not objective value. It is the kind of pressure they create. 9...Nh5 throws both sides into a concrete battle, where every move can be scored by an engine and looked up by an opponent. 9...a5 throws both sides into a strategic battle, where the question is no longer "is this move right or wrong" but "do you know which wing should be opened first".

For a player used to being forced into compulsory lines, that role reversal has real psychological value. You are no longer the person who must remember the most in the room. You become the person asking the questions. But do not confuse that with an objective advantage — it is an advantage of comfort, and comfort is not scored in points.

White does not stand still either. Any sideline pushed into the headlines will generate a reply. After 9...a5, White can switch to b5, switch to c5, or simply redirect to the kingside before Black can seal the structure. That is the rule of the opening industry: a move is useful only until someone seriously analyzes it from the other side.

The truth sits where it is hardest to verify

This is where I must say what opening producers do not like to hear. The entire sales argument for 9...a5 rests on three pillars, and only one of them has data.

Pillar one: "the position is balanced". That is a positional claim, not a technical claim. 9...a5 is legal, Black may well be equal. But "balanced" does not mean "easy". The Mar del Plata remains the Mar del Plata. You do not escape calculation by picking a move with fewer variations — you only swap one kind of calculation for another.

Pillar two: "few concrete lines, little to memorize". That is the most genuine sales point and also the blurriest. Not one game, not one number, not one win rate is offered as proof. No average centipawn loss, no draw rate, no named player behind it. The buyer is invited to believe, not to verify. In any other industry, a product selling strategy without naming the strategist would be challenged on the spot. In chess, it slips by.

Pillar three — and this is the one I find most dangerous: "computers often do not know how to handle such complex strategic positions". That sentence was true in the pre-AlphaZero era. It is false now. Today's neural-network engines handle long-term King's Indian positions far better than that claim implies. When a product builds its value around an outdated premise, the buyer is not buying tactics — the buyer is buying a belief.

And there is one detail that made me stop. The source document I read contradicts itself: the headline describes a team round report in Samarkand, while the entire body is a promotion for the King's Indian DVD. Two unrelated texts spliced together, with no team, no game, no result in the body. If even the label is wrong, what in the substance deserves trust? This is an information-integrity problem, and it is more serious than any opening debate.

The contrarian angle: where could I be wrong?

I have to put the question back to myself. If 9...a5 really is just a copy of a known branch, why does it still make so many players buy?

Because the fear of misremembering is real. I have sat in many analysis rooms in India where young players stare at screens, not because they do not understand chess, but because they fear their opponent remembers more than they do. A move that promises "stop memorizing, start understanding" sells not because it is strong, but because it touches the exact wound. On that score, this product is more honest than its surface suggests.

And I could be wrong in another way. My experience comes mostly from rewatching footage and sitting beside analysis boards, not from holding the pieces against a 2700 opponent. I have misread a player's name, then read the position correctly once the screen rewound in slow motion. With an opening move, the distance between "sideline" and "dead line" is decided only when someone plays it at the highest level. And that is something this DVD cannot do.

There is one more possibility I am not allowed to ignore: perhaps the 9...a5 branch is maturing faster than I think, and strong players are quietly using it to avoid games their opponents have prepared. If so, I am the latecomer, not the correct skeptic.

So what is actually worth anything?

As someone who has followed Indian chess for more than two decades, I see the value of 9...a5 on a different floor from where the seller stands. It is not a weapon for a player who wants to topple a stronger opponent. It is a tool for a club player who wants out of games lost by being pushed into a position someone else has memorized.

If you are a 1800 to 2200 player buying the DVD because you want a choice instead of a recitation, the product may be worth it. It gives you a position you can play on judgment. But if you buy it believing it neutralizes the Bayonet, you are buying a promise no one — including the hidden author — can verify. Demand a sample game with engine evaluation before you pay.

At the industry level, this is a perfect example of the opening-book segment: stable, unglamorous, and surviving by selling answers to fashionable questions. It competes directly with free databases and free engines. What keeps it alive is not the moves — anyone can look those up — but the structure, the narration, and a story that makes buyers believe they are purchasing understanding rather than a list. Agents sell players; DVD sellers sell moves. Both live on noise. Noise is not evil, but it is not evidence.

What I am waiting for

I will not conclude that 9...a5 is weak. It is not weak. It is simply unproven.

What I am waiting for: a classical game between two players rated above 2700, where Black chooses 9...a5 against an opponent prepared for the Bayonet. If Black holds a comfortable draw, this book has real value. If White wins with a familiar kingside attack, then the "antidote" is just a hyped sideline.

And if one day someone rebuts this DVD with another DVD, then you know what is happening: nobody is progressing, everybody is selling.

Empty applause can kill emotion, but it cannot kill tactics. And tactics, in the end, always need one game to prove they are worth remembering. I will wait for that game, beside the analysis board, at two in the morning.