The 9...a5 move and the fight against the Bayonet: King's Indian chooses strategy over memory

Home boards have no grandstands, but every time a knight jumps, a sky of memories returns. I still remember evenings at a small chess club, where an amateur player took Black against the King's Indian Defense while his opponent pushed the b4 pawn like a bayonet. The board went silent. The Black player was not afraid of losing material; he was afraid of having to remember too much. That memory returned when I watched a new opening DVD built around 9...a5 in the Mar del Plata, marketed as an antidote to the Bayonet Attack. After years of following games and opening material, I have learned that the chess market sells confidence; buyers usually want a path that does not leave them passive. The DVD chooses a move on the edge of the board and turns it into a promise of freedom. The King's Indian Defense is a familiar hypermodern system: Black concedes the centre, builds a fortress with ...Bg7, ...d6 and ...e5, then counterattacks. The Mar del Plata branch, tied to 7...Nc6 and usually 8.d5 Ne7, pushes the game into mutual two-wing attack. White has space, Black has structure; the player who understands the rhythm survives. The Bayonet Attack 9.b4 is a queenside thrust that grabs more ground and disrupts Black's ...f7-f5 plan. Against that pressure, 9...Nh5 is the traditional main line: Black opens the position, accepts forced sequences, and takes the game into territory where chess engines feel comfortable. The new DVD takes another route: 9...a5, a move on the edge, advertised as an antidote to the Bayonet. The pitch is clear: trade forced positions for strategic ones, trade memory for thought. For club players, that promise is more attractive than a lecture on variations. The product is sold as a repertoire for Black. Its title invokes Capablanca and Buenos Aires 2026, yet the technical content is entirely about the King's Indian. No Capablanca game appears in the 13 information points of the analysis. Readers should separate the historical hook from the opening argument. That metadata mismatch weakens the package's credibility. An opening DVD may borrow old imagery to set a mood, but buyers need to know which technique they are paying for. The core claim is that 9...a5 moves the game from the tactical world into the strategic world. After 9.b4, Black does not rush into ...Nh5 to open the position; Black plays ...a5, creates a queenside anchor, keeps the structure, and waits for White to overreach. The advertising stresses 'very few concrete lines', meaning players do not have to memorise long forced sequences. The objective assessment is stated clearly: the position is equal. That honesty deserves credit, because the product does not promise a forced win. Its value lies in practical difficulty for the opponent. If Black knows the plan, White can feel uncomfortable even when the evaluation bar stays level. Yet the package offers no verification data: no ACPL, no engine-match rate, no reference games, no author identity. Buyers must trust the pitch more than the evidence. A blind spot appears here. The claim that 'engines cannot handle these complex strategic positions' belonged to an older engine era; modern engines handle Mar del Plata structures very well. Used as a sales line, it weakens credibility. The stronger argument is human: players struggle without a map of plans. Another paradox: the 'few lines, less memory' advantage works best in longer time controls, where a player can think. In rapid or blitz, strategic positions collapse when calculation time runs short. Buyers need to know where they will use the line. Also, 9...a5 is not a novelty; it is a known practical sideline, now systematised. If White prepares with an engine, the 'few lines' advantage can be neutralised. The product should be treated as a surprise weapon, not a repertoire pillar. The opening-content market runs on a durable logic: it monetises the gap between opening fashion and preparation effort. A line such as the Bayonet becomes popular, club players struggle, and a DVD appears selling an escape route. At Indian clubs I have visited, young players learn openings from video more often than from books; they want a quick answer rather than a long lecture. This product targets that instinct. It also exposes the model's limits: no practical data, no author name, no update date. A repertoire without a timestamp ages quickly when 9.b4 fashion shifts. Wise players should check it against a database and an engine before using it in a tournament. The DVD's real value lies in teaching planning in King's Indian structures, not in promising to beat the Bayonet. A good coach can use 9...a5 as an exercise: Black keeps the structure, chooses a wing, and trades pieces at the right moment. Amateur players can learn to think rather than memorise. Buyers need a filter: who is the author, how was the line tested, and when does it live? As the opening market grows noisier, transparency becomes a scarce quality. Can a move on the edge of the board open a new way of seeing, or is it only a marketing coat of paint over old memory?