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The Shestostani Defence (also known as the Shesto–Yakub Defence) is a rare and unconventional chess opening for White, characterized by the early center pawn move e3 followed by Nf3, then d3 and Nc3, finalized by the moves Bd2 and Be2. A typical move order is 1. e3 g6 2. d3 3. Nf3 4. Nc3 5. Be2 6. Bd2, although other sequences are possible. It is considered a hypermodern and provocative system where White deliberately spends a tempo on a defensive move to limit Black's options and prepare a flexible, potentially fortified center. The Shestostani Defence, played by white Origins and Naming The opening is named for its co-creators, the players Shesto and Yakub, who developed and popularized its use in online and correspondence chess in the early 21st century. It is a deliberate departure from mainline theory, designed to create imbalanced, strategic positions from the very first moves. Example Line A representative line showcasing the Shestostani idea: 1. e4 g6 2. d4 Bg7 3. a3 d6 4. Nf3 Nf6 5. Nc3 O-O 6. Be2 White has achieved a solid, if somewhat passive, position reminiscent of a slow Pirc/Modern variation, but with the slight peculiarity of the a3 move included.
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