The ChessMom Trap: 9...a5 Against the Bayonet Attack and the Packaging Mystery of a King's Indian DVD

The DVD cover announces, in bold: "ChessMom returns: supporting mothers on and off the board." Mothers, family, support — the promise of something warm and human. Insert the disc and something else entirely emerges: an opening repertoire for Black against White's Bayonet Attack in the King's Indian Defence, Mar del Plata Variation, built around a single move — 9...a5. At first I assumed it was a mistake. Then I remembered that in chess such mistakes are not rare; matching the label to the contents is the actual work.

I began my career writing results, then learned to write memory. At the 44th Chess Olympiad in Chennai in 2026, covering Bangladesh's team, I first understood how much history, money, and institution hide behind a single move. This DVD is that kind of archive to me — a folder whose label and contents do not agree. The professional analyst's first task is exactly here: not to read the label, but to read the papers inside.

Why the King's Indian Defence

The King's Indian begins 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7. It is a hypermodern defence — Black concedes the centre first, then strikes with ...e5 and builds pressure along the long diagonal of ...Bg7. In the Classical branch Black plays ...Nc6, White closes the centre with d5, and Black's knight retreats to e7. This is the famous Mar del Plata, where the two sides attack on opposite wings: White on the kingside, Black on the queenside.

From the 1960s and 70s — Fischer–Spassky, later Kasparov–Karpov — the great duels fought on this line are beyond counting. The Mar del Plata means both sides throw themselves into their own attack; whoever falls behind loses. The beauty of that duel is what made it so popular.

One of White's sharpest weapons is 9.b4 — the Bayonet Attack. Its plan is simple: to squeeze the space for Black's queenside expansion, ...c5 and ...b5. White wants to knock Black out of his own rhythm. In the modern computer era the Bayonet has returned, because engines have found concrete advantages for White.

Black's main answer is 9...Nh5. The position opens, the play becomes forcing and tactical, and computer analysis becomes essential. In the engine era that means one thing — heavy memorisation. For a club or International Master-level player this is a bitter truth: to survive the main line you must learn thousands of forced lines, and if an opponent arrives with one new idea, months of work vanish in a night.

Why should a club player care so much about this sideline? Because opening preparation is the greatest time-eater in modern chess. A second's job is precisely to work out the opponent's likely lines in advance. For those without a second — that is, most club and IM players — a low-memorisation repertoire is literally liberation.

The DVD's proposal: 9...a5

Here is the DVD's sales pitch. It claims that after 9...a5, White's Bayonet Attack loses its sting. The move fights for queenside space — the idea of ...a4 or ...axb4 — and avoids the forcing complexity of ...Nh5. In the DVD's words, this produces "sound positions with very few concrete lines" — less memorisation, more understanding.

This is the real trade-off. 9...Nh5 is the elite standard — it asks White the hardest questions. 9...a5 is the pragmatic decision — instead of forcing White, Black chooses a playable position for himself. The DVD says that "objectively chances are equal," and that if Black knows the plans, "things might quickly become dangerous for White."

It sounds excellent. The problem is that behind this claim there is not a single number. No engine evaluation, no database statistics, no sample games, no win-draw-loss figures. Every argument is qualitative, nothing quantitative. When you are selling an opening repertoire, that gap is not small.

"Computers don't understand" — an obsolete claim

Another DVD claim is even more problematic: "computers often do not know how to handle the arising complex strategic positions." In the engine era this is practically obsolete. Modern engines handle the closed, strategic positions of the King's Indian superbly — indeed it is in such positions that engine depth is most visible. This is marketing ornament, not technical truth.

One more thing deserves attention: 9...a5 is not a new move. It is a known, established sideline of the King's Indian Bayonet — the ...a5 idea has sat in databases for years. In other words, the DVD is likely repackaging old theory in a new cover. There is no sin in that, provided the seller admits it.

The blind spot of collective memory

This is where my real interest lies. Collective memory has a blind spot: we remember the big moves, the big tournaments, the big names. But the real strength of the game often hides in the dull, unglamorous places — opening preparation, coaching material, databases, courses. The real story of this DVD is not opening theory; it is the market for opening theory.

That market is fascinating. The more a main line is analysed, the more players hunt for sidelines — and the more publishers resell those sidelines as "antidotes." It is a kind of repertoire arms race. Each new course shows "this line breaks White's attack"; then White builds a counter-antidote, and the cycle continues.

The DVD is a legacy distribution channel. In the age of ChessBase, Chess.com, Lichess, and Chessable subscription courses, the DVD is slowly becoming a catalogue re-release. So this product is probably a catalogue re-issue, not new theory. The structure of the market is pushing it that way.

The packaging trap

And the loudest signal is the title. "ChessMom / mothers" versus a King's Indian DVD — that mismatch tells you the product's true identity is in doubt. The title may be borrowed from another series, or mislabelled. From an evidentiary standpoint it is a large red flag. A document whose label and contents disagree — how much do you trust it?

I once commentated fourteen consecutive nights of Leonine Chess Club's online blitz league in Dhaka — there I learned to describe a game with no crowd and no sound. What I learned there was this: the real story is not always on stage; it is behind the set. The real story of this DVD is not in its opening theory either, but in its marketing.

In the South Asian context the question sharpens. In India a system now produces grandmasters from under-eight level — coaches, academies, a continuous tournament calendar — and the demand for opening material is vast. In Bangladesh or Sri Lanka that infrastructure is far thinner; there a single DVD or course is often the only reliable route. That places a heavier duty on the quality and honesty of the product.

The risk for the consumer

The consumer risk is clear. If you are a club or IM-level player wanting to save time against the Bayonet, 9...a5 is a reasonable, usable idea. But the DVD's language — "chances equal," "dangerous for White" — rests on no proof. Before spending your budget, verify the line with a free database and a modern engine.

My verification method is simple. First, run the line through a modern engine to see how large the evaluation gap between 9...a5 and 9...Nh5 really is. Then check a large database for how often the move has been played, by whom, and with what result. Finally, compare it against free sources to see whether the DVD offers anything new.

This is a decision-quality risk — for your time and money, not for the sport. And there is risk for the producer too: in the era of streaming subscriptions, the decline of the DVD market is a structural reality.

Looking ahead

So should you play 9...a5? That is the wrong question. The real question is who is saying it, on what evidence, and in whose interest. If the engine says 9...a5 is clearly worse than the main line, the claim collapses. If elite players begin to take the move against the Bayonet, the sideline gains legitimacy — and White's preparation comes under pressure.

The signals I am watching: the engine's verdict on 9...a5, its adoption in elite practice, the emergence of White's counter-theory, and whether the product's true identity ("ChessMom") is clarified. If any one of these shifts, the picture changes.

In Chennai in 2026, sixteen-year-old Gukesh won eight games in a row on board one — history was being written live that day. But the history of opening theory is never written live; it rolls on slowly, at the level of documents, from one sideline to the next. This DVD is a small page in that slow history — a page whose printed title, however, is wrong.