{
  "pack_format_version": 3,
  "slug": "nimzo-indian-essentials-white",
  "title": "The Nimzo-Indian Defence: Essentials (White Repertoire)",
  "author_name": "Theo van Stratum",
  "version": 1,
  "description": "A White repertoire covering the main approaches against the Nimzo-Indian Defence (1.d4 Nf6 2.c4 e6 3.Nc3 Bb4). Includes the classical Rubinstein Variation (4.e3), the Samisch Variation (4.a3) with its thematic bishop pair versus doubled pawns, the Classical Variation (4.Qc2) that sidesteps the doubled pawns altogether, and the sharper Leningrad Variation (4.Bg5).",
  "content_types": [
    "lines"
  ],
  "price_cents": null,
  "lines": [
    {
      "name": "Nimzo-Indian Defence: The Rubinstein Variation",
      "side": "white",
      "eco": "E41",
      "moves": [
        "d2d4",
        "g8f6",
        "c2c4",
        "e7e6",
        "b1c3",
        "f8b4",
        "e2e3",
        "e8g8",
        "f1d3",
        "d7d5",
        "g1f3",
        "c7c5",
        "e1g1",
        "b8c6",
        "a2a3",
        "b4c3",
        "b2c3",
        "b7b6",
        "d1e2",
        "d8c7"
      ],
      "annotations": {
        "6": {
          "note": "The classical approach: a flexible pawn move that prepares to meet the bishop's check without committing the structure to anything yet.",
          "format": "markdown"
        },
        "8": {
          "note": "Developing naturally, eyeing e4 and the h7-pawn further down the road.",
          "format": "markdown"
        },
        "10": {
          "note": "Completing development before the centre gets resolved.",
          "format": "markdown"
        },
        "12": {
          "note": "Castling into safety just before the central tension is addressed.",
          "format": "markdown"
        },
        "14": {
          "note": "Finally asking the bishop the question -- it has to either trade itself for the knight on c3 or retreat.",
          "format": "markdown"
        },
        "16": {
          "note": "Recapturing toward the centre. The doubled c-pawns are the price of the extra bishop and the semi-open b-file.",
          "format": "markdown"
        },
        "18": {
          "note": "Centralising the queen and eyeing the e-file. The pawn on c5 was briefly loose right after the trade on c3, but Black addressed that immediately with ...b6, so it's no longer a target.",
          "format": "markdown"
        }
      },
      "variations": [
        {
          "branch_ply": 7,
          "moves": [
            "b7b6",
            "g1f3",
            "c8b7",
            "f1e2",
            "d7d5"
          ],
          "annotations": {
            "0": {
              "note": "A flexible fianchetto approach, delaying ...d5 to see how White commits the light-squared bishop first.",
              "format": "markdown"
            },
            "2": {
              "note": "Completing the fianchetto, eyeing e4 along the long diagonal.",
              "format": "markdown"
            },
            "3": {
              "note": "A quieter developing square than Bd3 here, since the diagonal is already covered and this keeps d3 free for the knight or queen later.",
              "format": "markdown"
            }
          }
        }
      ]
    },
    {
      "name": "Nimzo-Indian Defence: The Samisch Variation",
      "side": "white",
      "eco": "E25",
      "moves": [
        "d2d4",
        "g8f6",
        "c2c4",
        "e7e6",
        "b1c3",
        "f8b4",
        "a2a3",
        "b4c3",
        "b2c3",
        "b7b6",
        "e2e3",
        "c7c5",
        "f1d3",
        "c8b7",
        "g1f3",
        "e8g8",
        "e1g1",
        "b8c6",
        "d1e2",
        "f8e8"
      ],
      "annotations": {
        "6": {
          "note": "The defining move of the Samisch: forcing the issue immediately rather than developing first. The bishop on b4 now has to trade or retreat, and either way White ends up with the bishop pair as compensation for the coming doubled pawns.",
          "format": "markdown"
        },
        "8": {
          "note": "Recapturing toward the centre. The doubled c-pawns are a long-term structural concession, but the bishop pair and the open b-file are real compensation.",
          "format": "markdown"
        },
        "12": {
          "note": "Developing actively rather than rushing the knight out first -- the g2-pawn isn't yet a concern since nothing of Black's points at it.",
          "format": "markdown"
        },
        "14": {
          "note": "Completing development. This also blocks the long diagonal the moment Black's bishop gets to b7, so there's never a real threat to worry about there.",
          "format": "markdown"
        },
        "16": {
          "note": "Castling into safety now that development is essentially complete.",
          "format": "markdown"
        },
        "18": {
          "note": "Centralising the queen and connecting the rooks along the back rank.",
          "format": "markdown"
        }
      },
      "variations": [
        {
          "branch_ply": 7,
          "moves": [
            "b4e7",
            "g1f3",
            "e8g8",
            "e2e3",
            "d7d5"
          ],
          "annotations": {
            "0": {
              "note": "Declining the trade altogether -- keeping the bishop pair for Black instead of handing White the usual Samisch structure. This avoids the doubled pawns entirely, at the cost of a tempo.",
              "format": "markdown"
            },
            "3": {
              "note": "Keeping the structure solid and flexible rather than committing to e4 immediately.",
              "format": "markdown"
            },
            "4": {
              "note": "Challenging the centre now that both sides have castled.",
              "format": "markdown"
            }
          }
        }
      ]
    },
    {
      "name": "Nimzo-Indian Defence: The Classical Variation (4.Qc2)",
      "side": "white",
      "eco": "E32",
      "moves": [
        "d2d4",
        "g8f6",
        "c2c4",
        "e7e6",
        "b1c3",
        "f8b4",
        "d1c2",
        "e8g8",
        "a2a3",
        "b4c3",
        "c2c3",
        "b7b6",
        "b2b4",
        "c8b7",
        "c1b2",
        "d7d6",
        "g1f3",
        "b8d7",
        "e2e3",
        "c7c5"
      ],
      "annotations": {
        "6": {
          "note": "The point of the Classical treatment: meeting the coming ...Bxc3+ with the queen rather than the pawn, so the pawn structure stays intact.",
          "format": "markdown"
        },
        "8": {
          "note": "Provoking the trade on White's own terms, now that recapturing with the queen avoids any structural damage.",
          "format": "markdown"
        },
        "10": {
          "note": "Recapturing with the queen -- the entire point of 4.Qc2. White keeps a healthy pawn structure in exchange for a slightly exposed queen.",
          "format": "markdown"
        },
        "12": {
          "note": "Expanding further on the queenside and supporting a future c5 push, while also giving the queen on c3 some extra cover.",
          "format": "markdown"
        },
        "14": {
          "note": "Completing the fianchetto, aiming down the long diagonal in direct opposition to Black's own bishop on b7.",
          "format": "markdown"
        },
        "18": {
          "note": "Solid and flexible, rounding out development before deciding on a central plan.",
          "format": "markdown"
        }
      },
      "variations": [
        {
          "branch_ply": 9,
          "moves": [
            "b4e7",
            "g1f3",
            "d7d5",
            "c4d5",
            "f6d5"
          ],
          "annotations": {
            "0": {
              "note": "Retreating rather than trading -- since White is ready to recapture on c3 with the queen anyway, there's less incentive for Black to volunteer the trade, and keeping the bishop pair instead has its own long-term value.",
              "format": "markdown"
            },
            "3": {
              "note": "Resolving the central tension immediately rather than letting Black choose the moment.",
              "format": "markdown"
            }
          }
        }
      ]
    },
    {
      "name": "Nimzo-Indian Defence: The Leningrad Variation",
      "side": "white",
      "eco": "E30",
      "moves": [
        "d2d4",
        "g8f6",
        "c2c4",
        "e7e6",
        "b1c3",
        "f8b4",
        "c1g5",
        "h7h6",
        "g5h4",
        "c7c5",
        "e2e3",
        "d7d6",
        "g1f3",
        "b8d7",
        "f1e2",
        "b7b6",
        "e1g1",
        "c8b7",
        "a1c1",
        "e8g8"
      ],
      "annotations": {
        "6": {
          "note": "The Leningrad idea: developing the bishop actively and putting an immediate question to the knight on f6, rather than the quieter e3 set-ups.",
          "format": "markdown"
        },
        "8": {
          "note": "Retreating to keep the pin-like pressure rather than trading it off for nothing.",
          "format": "markdown"
        },
        "10": {
          "note": "A solid, flexible follow-up rather than rushing into complications -- there's no need to resolve the central tension immediately.",
          "format": "markdown"
        },
        "12": {
          "note": "Developing naturally and keeping d4 well supported.",
          "format": "markdown"
        },
        "16": {
          "note": "Castling into safety. The bishop on b4 is left slightly loose, but with the king off e1 it's no longer pinning anything, so there's no rush to address it.",
          "format": "markdown"
        },
        "18": {
          "note": "Adding support to the c-file before deciding how (or whether) to resolve the tension with Black's bishop.",
          "format": "markdown"
        }
      },
      "variations": [
        {
          "branch_ply": 11,
          "moves": [
            "c5d4",
            "e3d4",
            "d7d5",
            "c4d5",
            "d8d5"
          ],
          "annotations": {
            "0": {
              "note": "Challenging the centre immediately rather than the calmer ...d6 -- this opens the position up rather than keeping things closed.",
              "format": "markdown"
            },
            "1": {
              "note": "Recapturing toward the centre, keeping an isolated-but-supported pawn majority rather than doubling on the c-file.",
              "format": "markdown"
            },
            "3": {
              "note": "Resolving the tension straight away.",
              "format": "markdown"
            }
          }
        }
      ]
    }
  ],
  "woodpecker_sets": [],
  "endgame_positions": []
}