9...a5: A Strategic Escape for the King's Indian Defence against the Bayonet Attack

That afternoon, at a coffee shop near Han Market, a 45-year-old chess player asked me a question I cannot forget: "If I don't want to memorize thirty pages of lines against 9.b4, what move should I play?" He had played the King's Indian Defence for two decades, but every time his opponent sat down with the Bayonet position on the board, he felt himself aging ten years. I was about to recite a forced variation, then I fell silent. That silence led me into a different journey: how a sideline can become a shelter for players who no longer have enough time to chase the engine. The King's Indian Defence, Mar del Plata branch, starts with familiar moves: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7. Here, the Bayonet Attack 9.b4 has been White's favourite weapon since the late 1990s, when top grandmasters realized that expanding on the queenside could disturb Black's kingside attacking plans. The standard reply is 9...Nh5, a complex that forces both sides into deep variations where the computer becomes the arbiter. The product introduced in the original article offers a different choice: 9...a5. This is not exactly a novelty in the opening database; it is the revival of a sideline long absent from top-level practice. Crucially, it promises "very few concrete lines," a much lighter burden on memory than the main line. According to the technical analysis, 9...a5 is not sold as a theoretical refutation, but as a practical option. The product's author uses a suspicious line: "computers often do not know how to handle the arising complex strategic positions." That sentence has a pre-AlphaZero flavour. Modern machines, with neural networks and advanced search algorithms, evaluate closed, manoeuvring positions far better than the engine generation of the 2010s. If the author meant only that engines can misevaluate long-horizon strategic concessions, the sentence still contains a grain of truth. But using it as a blanket claim to sell the product is an outdated approach. What stands out is that the original article, after advertising, concedes that after the main move 9...Nh5, "lines get forced, and computer analysis becomes important again." In other words, the DVD's value exists only on the condition that players avoid the main line. That is a self-limiting promise, not an overall improvement for Black's defensive system. The product also contains an internal contradiction. On one side, it is sold to people who like to think for themselves instead of memorizing. On the other side, it is sold because it has very few concrete lines. These two claims appeal to two different buyer profiles: the independent thinker and the time-poor pragmatist. The article blends them together to make the sales pitch more attractive. Moreover, the whole technical section lacks verifiable evidence. There is no illustrative game, no database frequency, no engine evaluation index, no named player who has used the line. The phrase "objectively chances are equal" sounds cautious, but it is only the author's comment, not a measurement. Anyone who wants to play 9...a5 seriously must verify it with their own database and engine. The counter-intuitive angle is this: what is sold as an antidote is actually a low-risk drawing weapon. The Bayonet Attack is scoring well at the level of the product's buyers, so the demand for an escape is real. But 9...a5 does not offer an advantage; it simply reduces variance. Strategically strong players with limited preparation time will benefit. Players who need tactical sharpness may suffer. The more popular the line becomes, the faster its surprise value decays. In terms of media, the DVD format is a declining distribution channel. Platforms such as Chessable, online courses, and database-based opening preparation tools are replacing it. This is a structural signal more important than the opening content itself. Based on my experience watching tournaments and studying openings, my advice for Vietnamese players is to treat 9...a5 as a secondary weapon. Do not abandon the 9...Nh5 complex entirely, because that is where real understanding of the position is tested. There are moves that seem like exile, yet they become a mirror for looking at our own fear. I thought I was exiled from football, but football led me deeper into myself. With chess, too, every line is not a final answer, but an invitation to step inside the position and recognize our own limits. A game of chess does not need deep theory to be a poem, but it cannot replace reading the position with one's own eyes.