{
  "pack_format_version": 3,
  "slug": "larsens-opening-essentials-white",
  "title": "Larsen's Opening: Essentials (White Repertoire)",
  "author_name": "Theo van Stratum",
  "version": 1,
  "description": "A White repertoire for Larsen's Opening (1.b3, the Nimzo-Larsen Attack), organised by Black's reply. Includes a Ruy-Lopez-style pin against 1...e5, a quiet fianchetto treatment against 1...d5 and 1...Nf6, and a double-fianchetto treatment against 1...c5.",
  "content_types": [
    "lines"
  ],
  "price_cents": null,
  "lines": [
    {
      "name": "Larsen's Opening: vs 1...e5",
      "side": "white",
      "eco": "A01",
      "moves": [
        "b2b3",
        "e7e5",
        "c1b2",
        "b8c6",
        "e2e3",
        "g8f6",
        "f1b5",
        "f8d6",
        "g1f3",
        "d8e7",
        "e1g1",
        "e8g8",
        "d2d4",
        "e5e4",
        "f3d2",
        "f8e8",
        "d1e1",
        "a7a6",
        "b5a4",
        "h7h6"
      ],
      "annotations": {
        "0": {
          "note": "Larsen's Opening: fianchettoing the queen's bishop before anything else, aiming it at the long diagonal from the very first move.",
          "format": "markdown"
        },
        "2": {
          "note": "Completing the fianchetto. The bishop eyes e5 and beyond, so Black's reply usually needs to address that pressure straight away.",
          "format": "markdown"
        },
        "4": {
          "note": "A modest central move, keeping d4 in reserve and preparing to develop the king's bishop.",
          "format": "markdown"
        },
        "6": {
          "note": "Pinning the newly developed knight to the king, a thematic idea borrowed straight from the Ruy Lopez.",
          "format": "markdown"
        },
        "8": {
          "note": "Developing naturally.",
          "format": "markdown"
        },
        "10": {
          "note": "Castling into safety.",
          "format": "markdown"
        },
        "12": {
          "note": "Striking in the centre now that development is complete.",
          "format": "markdown"
        },
        "14": {
          "note": "Retreating the knight rather than losing it to Black's central pawn push, and eyeing a useful regrouping square on c4 or e4 later.",
          "format": "markdown"
        },
        "16": {
          "note": "Repositioning the queen off the back rank, keeping both rooks connected and ready to support whichever plan develops.",
          "format": "markdown"
        },
        "18": {
          "note": "Retreating the bishop along the same diagonal rather than trading it off, keeping the pin on the long-term agenda.",
          "format": "markdown"
        }
      },
      "variations": [
        {
          "branch_ply": 8,
          "moves": [
            "d1e2",
            "e8g8",
            "g1f3",
            "f8e8",
            "d2d3"
          ],
          "annotations": {
            "0": {
              "note": "An alternative move order: repositioning the queen before developing the king's knight.",
              "format": "markdown"
            },
            "4": {
              "note": "A flexible central move, keeping options open regardless of the exact move order used to reach here.",
              "format": "markdown"
            }
          }
        }
      ]
    },
    {
      "name": "Larsen's Opening: vs 1...d5",
      "side": "white",
      "eco": "A01",
      "moves": [
        "b2b3",
        "d7d5",
        "c1b2",
        "b8c6",
        "e2e3",
        "g8f6",
        "g1f3",
        "c8f5",
        "f1e2",
        "e7e6",
        "e1g1",
        "f8d6",
        "d2d3",
        "e8g8",
        "b1d2",
        "d8e7",
        "c2c4",
        "a8d8",
        "d1c2",
        "d5c4"
      ],
      "annotations": {
        "0": {
          "note": "Larsen's Opening.",
          "format": "markdown"
        },
        "2": {
          "note": "The fianchetto treatment, aiming the bishop down the long diagonal rather than contesting the centre with pawns.",
          "format": "markdown"
        },
        "4": {
          "note": "A modest central move, keeping d4 in reserve.",
          "format": "markdown"
        },
        "6": {
          "note": "Developing naturally.",
          "format": "markdown"
        },
        "8": {
          "note": "A quiet developing square for the bishop, keeping the position solid.",
          "format": "markdown"
        },
        "10": {
          "note": "Castling into safety.",
          "format": "markdown"
        },
        "12": {
          "note": "Supporting the centre and preparing to develop the queen's knight.",
          "format": "markdown"
        },
        "14": {
          "note": "Developing the last knight toward the centre.",
          "format": "markdown"
        },
        "16": {
          "note": "Challenging Black's central pawn now that development is complete.",
          "format": "markdown"
        },
        "18": {
          "note": "Repositioning the queen to support the c4 push and keep an eye on the long diagonal from a different angle.",
          "format": "markdown"
        }
      },
      "variations": [
        {
          "branch_ply": 8,
          "moves": [
            "c2c4",
            "e7e6",
            "f1e2",
            "f8d6",
            "e1g1"
          ],
          "annotations": {
            "0": {
              "note": "A more direct approach: grabbing extra central space with c4 immediately rather than developing the bishop first.",
              "format": "markdown"
            },
            "4": {
              "note": "Castling into safety, reaching a similar structure to the main line via a different move order.",
              "format": "markdown"
            }
          }
        }
      ]
    },
    {
      "name": "Larsen's Opening: vs 1...Nf6",
      "side": "white",
      "eco": "A01",
      "moves": [
        "b2b3",
        "g8f6",
        "c1b2",
        "g7g6",
        "e2e3",
        "f8g7",
        "g1f3",
        "e8g8",
        "f1e2",
        "d7d6",
        "e1g1",
        "b8c6",
        "d2d4",
        "e7e5",
        "d4d5",
        "c6e7",
        "b1d2",
        "f8e8",
        "c2c4",
        "e7f5"
      ],
      "annotations": {
        "0": {
          "note": "Larsen's Opening.",
          "format": "markdown"
        },
        "2": {
          "note": "The fianchetto treatment, matching the King's Indian-style set-up Black has just signalled.",
          "format": "markdown"
        },
        "4": {
          "note": "A modest central move, keeping d4 in reserve.",
          "format": "markdown"
        },
        "6": {
          "note": "Developing naturally.",
          "format": "markdown"
        },
        "8": {
          "note": "A quiet developing square for the bishop.",
          "format": "markdown"
        },
        "10": {
          "note": "Castling into safety.",
          "format": "markdown"
        },
        "12": {
          "note": "Claiming the centre now that development is well under way.",
          "format": "markdown"
        },
        "14": {
          "note": "Advancing further, gaining space and kicking Black's knight away from c6 with tempo.",
          "format": "markdown"
        },
        "16": {
          "note": "Developing the last knight toward the centre.",
          "format": "markdown"
        },
        "18": {
          "note": "Gaining further queenside space now that the centre is fixed.",
          "format": "markdown"
        }
      },
      "variations": [
        {
          "branch_ply": 8,
          "moves": [
            "c2c4",
            "d7d6",
            "f1e2",
            "b8d7",
            "e1g1"
          ],
          "annotations": {
            "0": {
              "note": "A more ambitious approach: grabbing extra central space with c4 rather than developing the bishop first.",
              "format": "markdown"
            },
            "4": {
              "note": "Castling into safety, reaching a similar structure to the main line via a different move order.",
              "format": "markdown"
            }
          }
        }
      ]
    },
    {
      "name": "Larsen's Opening: vs 1...c5",
      "side": "white",
      "eco": "A01",
      "moves": [
        "b2b3",
        "c7c5",
        "c1b2",
        "b8c6",
        "e2e3",
        "g8f6",
        "g1f3",
        "e7e6",
        "f1e2",
        "f8e7",
        "e1g1",
        "e8g8",
        "d2d3",
        "b7b6",
        "b1d2",
        "c8b7",
        "c2c4",
        "d8c7",
        "d1c2",
        "a8d8"
      ],
      "annotations": {
        "0": {
          "note": "Larsen's Opening.",
          "format": "markdown"
        },
        "2": {
          "note": "The fianchetto treatment, aiming straight down the long diagonal at Black's queenside.",
          "format": "markdown"
        },
        "4": {
          "note": "A modest central move, keeping d4 in reserve.",
          "format": "markdown"
        },
        "6": {
          "note": "Developing naturally.",
          "format": "markdown"
        },
        "8": {
          "note": "A quiet developing square for the bishop.",
          "format": "markdown"
        },
        "10": {
          "note": "Castling into safety.",
          "format": "markdown"
        },
        "12": {
          "note": "A flexible central move, keeping the position solid.",
          "format": "markdown"
        },
        "14": {
          "note": "Developing the last knight toward the centre.",
          "format": "markdown"
        },
        "16": {
          "note": "Gaining queenside space now that development is well under way.",
          "format": "markdown"
        },
        "18": {
          "note": "Repositioning the queen, keeping both rooks free and the long diagonal fully supported from behind.",
          "format": "markdown"
        }
      },
      "variations": [
        {
          "branch_ply": 8,
          "moves": [
            "c2c4",
            "d7d5",
            "c4d5",
            "f6d5",
            "f1e2"
          ],
          "annotations": {
            "0": {
              "note": "A more direct approach: grabbing extra central space with c4 before developing the bishop.",
              "format": "markdown"
            },
            "4": {
              "note": "Developing naturally, keeping the position solid regardless of the central exchange that just took place.",
              "format": "markdown"
            }
          }
        }
      ]
    }
  ],
  "woodpecker_sets": [],
  "endgame_positions": []
}