9...a5 against the Bayonet Attack: Chess Theory, the Engine, and a Misplaced Name

On the cover is a name — ChessMom, a mother walking beside her child at the board. Inside, in the very first theory layer, is a move so dry it is hard to remember: 9...a5. Between the two there is not a single thread of connection. No mother, no family story, only a King's Indian Defense line and a promise that the player with the black pieces will escape the tangle the engine has already spun. I read that title over and over, then thought of the empty stands at the quiet chess tournaments back home. An empty stand still has an echo — you only need to be still enough to hear it. Here, the echo comes from a product wearing the wrong label, and the point worth noting is not the label, but what lies beneath it. To understand why a move like 9...a5 is packaged as an antidote, you have to place it in the true current of the King's Indian Defense. The system begins 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2 e5 7.0-0 Nc6. Black accepts a space disadvantage, builds a closed center, then counterattacks with ...e5 and opens a race to storm both wings. This is the playground of long-term plans, where both sides push pieces toward opposite flanks at the same time. The Mar del Plata Variation, with its locked center and twin explosions on the wings, was once the pride of an entire generation of attacking players. Then it was White's turn to find a new blade. The move 9.b4 — the Bayonet Attack, a bayonet thrust into the queenside — became the harshest test of Black's whole setup. For decades, Black's orthodox answer was 9...Nh5. The knight leaps to the rim, the position opens, and everything falls into the zone of long, forcing lines that the engine scans move by move. For an amateur, memorizing 9...Nh5 is like memorizing a long poem in a language that is not your mother tongue: you can recite it, but you do not understand it, and the moment your opponent shifts one beat, you forget everything. This DVD proposes another path: 9...a5. Instead of leaping the knight and accepting a fight in the open, Black pushes the queenside pawn, keeps the center closed, and pulls the game toward strategy rather than tactics. This is a real move in the theory bank, not a new invention. Its value lies in avoiding the fire zone that 9...Nh5 forces both sides to enter. Technically, this is a coherent idea. It targets the kind of player who prefers to think for himself rather than memorize, who likes positions with few forcing moves, where understanding matters more than memory. In other words, it sells the buyer something very human: the right to slow down. I once sat with a lost game simply because I forgot the seventeenth move of a theoretical line. That feeling — abandoned in a position I no longer understood — is exactly what the strategic approach tries to erase. But there is a large gap. The DVD offers not a single verifiable number. No ACPL — the average loss per move against the engine. No match rate with the engine's top choice. No win-draw-loss statistics from a database. All we have is an unsourced claim: that objectively the chances are equal. Standing alone, such a sentence is not analysis — it is belief. I have spent many evenings at the board checking promises like this. My tracking experience shows that a move in a main line, however good, is only one leg of a whole system. No single move neutralizes every way White can develop. The buyer needs to understand 9...a5 as a starting frame, not a guarantee. And here is the most important technical point, and the most inflated one. The DVD suggests that the engine often does not know how to handle these complex strategic positions. This sounds seductive to an amateur — it soothes the feeling that humans still have a door open. But in 2026-2026, it is no longer true. Modern engines such as Stockfish NNUE or Leela evaluate the closed structures of the KID quite reliably. The claim that the engine does not understand a position is true only of positions far beyond its calculating reach, not of a line dissected for decades. The contrarian angle lies here: the problem with this product is not the move, but the story wrapped around it. The ChessMom name straying from the content is not a small error. It is a sign of an industry attaching emotional labels to purely technical products, because it believes the buyer needs a story to pay. I do not blame the DVD's makers. I see in it a larger anxiety. The DVD format — a static medium, packaged once and sold forever — is being eroded by online courses, subscription databases, and free tools stronger than any commentary. Generations will pass, but the poem about them keeps being written. What is passing here is not a generation of players, but a way of transmitting theory: static packaging, one-way delivery. And that misplaced name accidentally becomes a measure of indifference. People need a mother to sell a chess line. The engine needs no one — it simply gives an evaluation, and the reader must decide. So, if you play Black against the Bayonet Attack and are tired of the forcing lines of 9...Nh5, 9...a5 is worth opening. Treat it as a door, not a fortress wall. And check it yourself with your own engine — because the only thing that is never misplaced is the board. A goal may fade, but the applause in memory never grows old. In chess, that applause is the moment you understand, not the moment you memorize.