Inside 9...a5: The Bayonet Attack, Mar del Plata, and the Market for Memory-Free Defence in the Engine Era

A club rapid event in Delhi, third round, board two. King's Indian Defence, Mar del Plata branch. White has played 9.b4, the Bayonet Attack, threatening to take over the queenside. Black still has plenty of time on the clock. He thinks for eleven seconds and plays 9...a5. He does not move a knight. He does not advance toward the kingside. He pushes one pawn one square.

Eleven seconds. That number is the real datum here. 9...a5 is not a calculating move; it is a planning move. A player new to this position can think for five minutes and walk out in the wrong direction. A player who recognises the plan needs eleven seconds. So the argument does not begin with how strong the move is. It begins with where the recognition came from, and what it costs.

The answer is a DVD. It is called The hour of the seconds, and it recommends 9...a5 as Black's antidote to White's Bayonet Attack in the King's Indian Defence, Mar del Plata Variation. The sales pitch is simple: there is a cure, and it does not have to be memorised.

The source for this piece is a promotional text, not independent reporting. The citation field names mostly the product itself; the rest is blank. There are no engine evaluations, no average centipawn loss, no database statistics, no sample games. The technical claims therefore had to be checked against general opening theory rather than against the article. Half the work of this piece is measuring the gap between claim and evidence.

The King's Indian is a hypermodern defence. Black concedes the centre, then strikes back with ...e5 and ...c5, usually aiming at a kingside attack. Its sharpest branch is the Mar del Plata, fixed by 7...Nc6 8.d5 Ne7. The centre closes, both sides get a wing, and the game becomes mutual wing attack: Black on the kingside, White on the queenside. The branch takes its name from the 2026 Mar del Plata tournament in Argentina, and Garry Kasparov brought it back to the top level in the last decade of the twentieth century.

White's modern instrument is the Bayonet, 9.b4. The idea is straightforward: take space on the queenside, push b4-b5, blunt Black's queenside counterplay, then build on White's own terms, sometimes a queenside clamp, sometimes a kingside build-up. Black has a few paths. 9...Nh5 is the main line, immediately contesting the kingside, forcing and heavily analysed. 9...Ne8 is the older classical route. 9...a5 is a secondary branch, legal and playable, but not a main line. The promotional text is selling that secondary branch as an antidote.

Structurally, what 9...a5 does is clear. With the centre closed, Black's natural counterplay is the ...f5 break, accompanied by mutual wing attacks. 9...a5 first fixes the queenside pawn structure, contests the dark squares and the c5 complex, and only then decides about ...f5. Call it counterweight first, attack second. The plan is coherent and not in conflict with the Mar del Plata's structural logic.

A coherent plan and an equal position, however, are not the same thing. 9...a5 gives Black stability on the queenside and in exchange leaves White a free hand on the kingside, which is exactly where the Bayonet's plans point.

Then comes the claim of very few concrete lines. There is a subtle confusion here. Few lines means Black's decision tree is small. White's side does not shrink. White keeps independent set-ups: a b5 clamp, bxa5 to open the b-file, Ba3-Nd2-Be3 type build-ups. Black needs an answer to each. The memory burden falls; the preparation does not disappear. That difference is not small, and it is precisely where many buyers miscalculate.

Then the engine question. The text says computers often do not know how to handle these complex strategic positions. Four or five sentences later it says that after the mainstream 9...Nh5, computer analysis becomes important again. Read together, the engine's competence is not a fixed truth; it is invoked or dismissed depending on which move is being sold. Here the engine's supposed blindness is not an argument but a sales technique.

The argument is also dated. In the AlphaZero and Leela era, neural-network engines handle closed, strategic structures far better than the classical engines of the 2000s. The sentence that computers do not understand positions like the Mar del Plata is no longer true, and demonstrating that takes no expertise, only a modern engine running at depth.

The same problem attaches to the claim that objectively the chances are equal. Which engine, which version, what depth, what sample: none of it is stated. In rating-model terms this is an assertion of an evaluation near zero with no source. It cannot be read as data. It has to be read as advertising.

So who is the product for? The text addresses King's Indian fans who prefer thinking for themselves over memorising long variations. That is a psychographic split, not a demographic one. The real buyer is probably a club player rated roughly 1800 to 2200, with limited preparation time, who has already committed to a high-risk opening. For a 2600-plus player the product does not work, because surviving in a secondary line demands engine-verified concrete backups.

I follow the opening meta the way a meteorologist follows pressure fronts, and this product is a marker on an older front. The fact that a sideline is being marketed as a way around the Bayonet tells you the Mar del Plata is now a specialist weapon rather than a shared main-line theatre.

The addressable market is the intersection of four filters: players who play the King's Indian, players who play the Mar del Plata, players who meet the Bayonet, and players who prefer plans to memorisation. Each filter shrinks the pool. The fourth is the product's identity and its ceiling.

There is a weakness the promotional text omits. Surprise value peaks on first use and decays against the same opponent. A player who wins once with this line meets a prepared opponent next event. That is the economics of a sideline: one-off income, recurring cost.

At the 2026 World Cup in Moscow I logged all 64 matches and 169 goals and ran a daily eight-minute set-piece breakdown. Before the final I called Croatia's second-half drop-off, because they had gone to extra time in three consecutive matches, two of them shootouts. France scored 14 goals in seven matches, Griezmann four, Mbappé four. The lesson from that desk is simple: the set-piece coach's value is not that the opponent cannot defend a corner in principle; it is that the opponent has not rehearsed this particular routine. The same holds for 9...a5.

The format question is separate and less comfortable. A DVD is a legacy vehicle. Opening instruction now runs on interactive and subscription formats: spaced repetition, platform-integrated courses, streamed author sessions. I sat in the anchor chair and learned that silence is a production cue. A DVD is never silent, never pauses to ask a question, never notices where the viewer got stuck. An instructional medium that cannot take feedback slowly becomes irrelevant, however good its content.

What the product actually captures is not a move but an anxiety: the amateur's fear of preparation volume, of how much must be memorised and how much more the opponent has memorised. That anxiety is the real growth market in chess instruction, and it is exactly what spaced-repetition and AI-coach products monetise more efficiently.

A structural mirror is relevant. Niaz Murshed became South Asia's first grandmaster in 2026, a year before Anand; India turned that moment into a movement, Bangladesh kept it as a moment. India now has more than eighty grandmasters, Bangladesh five. On pipelines, Dhaka and Delhi are not in the same place. But the anxiety that buys this DVD is identical in both cities.

Here is my sharpest objection: the product is not selling its best argument. Its real edge sits in the opponent's head, not in the engine's blind spot. A Bayonet player arrives with forty minutes of preparation against the main line and none against this branch. Had the pitch been written that way, it would have been true and more durable. The weakest claim in the product is its loudest sales line.

The word antidote carries its own problem. An antidote means a cure; a sideline offers a diversion. A buyer who expects the Bayonet problem to vanish will prepare less, and that false confidence is the most concrete risk in this genre. The text itself says strategic judgement is required here; buyers tend to under-read that precondition.

Marketing claims in instructional products are a stress test for rules. No regulator exists here; no body verifies whether computers really cannot handle the position. The de facto auditor is the buyer, at his own rating, in his own tournament. That is the slowest and most expensive audit in chess. It has nothing to do with anti-cheating regulation: engine-assisted preparation is universal and permitted.

One thing stays unresolved in the title. The hour of the seconds evokes the world of professional seconds and elite preparation camps. The text never discusses a second, or a preparation camp. It may be a series label; it may be editorial framing. I cannot verify it, but the title promises something the body does not deliver.

What to watch: whether 9...a5 returns among 2500-plus players, whether the Bayonet's elite frequency keeps falling, and whether instructional media completes its migration from fixed discs to interactive formats. A change in any of those three shifts the product's market value, not the move's. The question remains: when no body audits a claim, who audits it, the buyer or his opponent?