{
  "pack_format_version": 3,
  "slug": "queens-gambit-accepted-essentials-black",
  "title": "The Queen's Gambit Accepted: Essentials (Black Repertoire)",
  "author_name": "Theo van Stratum",
  "version": 1,
  "description": "A Black repertoire for the Queen's Gambit Accepted (1.d4 d5 2.c4 dxc4), the most direct way to meet 1.d4 2.c4. Includes the Classical main line (taking the pawn and striking back with ...c5), the critical 3...a6 system for holding onto the extra pawn with ...b5, Black's answer to the aggressive Central Variation (3.e4), and the early ...Bg4 pin on the f3-knight.",
  "content_types": [
    "lines"
  ],
  "price_cents": null,
  "lines": [
    {
      "name": "Queen's Gambit Accepted: Black's Classical Main Line",
      "side": "black",
      "eco": "D27",
      "moves": [
        "d2d4",
        "d7d5",
        "c2c4",
        "d5c4",
        "g1f3",
        "g8f6",
        "e2e3",
        "e7e6",
        "f1c4",
        "c7c5",
        "e1g1",
        "a7a6",
        "d1e2",
        "b7b5",
        "c4b3",
        "c8b7",
        "f1d1",
        "b8d7",
        "b1d2",
        "a8c8"
      ],
      "annotations": {
        "3": {
          "note": "Accepting the gambit: taking the pawn right away. It can't be held onto for free -- White's bishop will recapture it directly from f1 in due course -- but there's nothing wrong with grabbing it anyway and simply developing soundly afterward.",
          "format": "markdown"
        },
        "7": {
          "note": "Simple development, preparing ...c5 for central counterplay before worrying about the extra pawn.",
          "format": "markdown"
        },
        "9": {
          "note": "Striking back in the centre immediately -- this is the point of the whole approach. The pawn is gone either way, so there's no reason to delay.",
          "format": "markdown"
        },
        "11": {
          "note": "Expanding on the queenside before White can get any ideas with a4 or Qe2-style pressure first.",
          "format": "markdown"
        },
        "13": {
          "note": "Gaining further space and development tempo.",
          "format": "markdown"
        },
        "15": {
          "note": "Developing the bishop actively onto the long diagonal.",
          "format": "markdown"
        },
        "17": {
          "note": "Completing development naturally.",
          "format": "markdown"
        },
        "19": {
          "note": "Lining the rook up on the half-open c-file, ready to support a future ...cxd4 or pressure down that file.",
          "format": "markdown"
        }
      },
      "variations": [
        {
          "branch_ply": 10,
          "moves": [
            "e1g1",
            "b8c6",
            "d1e2",
            "c5d4",
            "e3d4",
            "f8e7",
            "f1d1",
            "e8g8"
          ],
          "annotations": {
            "4": {
              "note": "A simpler approach than the main line's queenside expansion: trading off the central tension at once and accepting an isolated d4-pawn for White, which is well covered here -- attacked twice (by this knight and the queen) and defended twice in turn, so there's no immediate way to win it.",
              "format": "markdown"
            }
          }
        }
      ]
    },
    {
      "name": "Queen's Gambit Accepted: Holding the Gambit Pawn with 3...a6",
      "side": "black",
      "eco": "D22",
      "moves": [
        "d2d4",
        "d7d5",
        "c2c4",
        "d5c4",
        "g1f3",
        "a7a6",
        "b1c3",
        "b7b5",
        "e2e4",
        "c8b7",
        "c1g5",
        "g8f6",
        "e4e5",
        "f6d5",
        "g5d2",
        "e7e6",
        "f1e2",
        "f8e7",
        "e1g1",
        "e8g8"
      ],
      "annotations": {
        "5": {
          "note": "Preparing ...b5 before developing anything else -- White's bishop can reach c4 directly at any point, so the defensive pawn has to get there first if the extra pawn is going to be kept at all.",
          "format": "markdown"
        },
        "7": {
          "note": "Now the pawn is genuinely defended -- attacked by nothing of White's, and if the bishop ever does take on c4, this pawn simply recaptures it.",
          "format": "markdown"
        },
        "9": {
          "note": "Developing the bishop onto the long diagonal while White claims central space -- the extra pawn is worth accepting a slightly passive position for, at least for now.",
          "format": "markdown"
        },
        "13": {
          "note": "The knight has to move somewhere once the e-pawn advances; d5 is the most natural, active square, and it even puts a question to the knight on c3 in return (nothing is hanging there -- it's defended once, by the b2-pawn).",
          "format": "markdown"
        },
        "17": {
          "note": "Completing development. The extra pawn on c4 is still safely held.",
          "format": "markdown"
        }
      },
      "variations": [
        {
          "branch_ply": 8,
          "moves": [
            "a2a4",
            "c8b7"
          ],
          "annotations": {
            "0": {
              "note": "Challenging the pawn chain head-on rather than playing in the centre first. This doesn't actually win the pawn back on its own -- b5 ends up attacked twice (by this pawn and the knight on c3) but still defended once, by the a6-pawn, and the knight simply can't capture there without losing a piece for a pawn -- so in practice this is really just an offer to trade a- and b-pawns.",
              "format": "markdown"
            }
          }
        }
      ]
    },
    {
      "name": "Queen's Gambit Accepted: Black Meets the Central Variation",
      "side": "black",
      "eco": "D20",
      "moves": [
        "d2d4",
        "d7d5",
        "c2c4",
        "d5c4",
        "e2e4",
        "e7e5",
        "g1f3",
        "e5d4",
        "f3d4",
        "b8c6",
        "d4c6",
        "b7c6",
        "b1c3",
        "g8f6",
        "f1c4",
        "f8e7",
        "d1f3",
        "e8g8",
        "c1e3",
        "d8d6"
      ],
      "annotations": {
        "5": {
          "note": "Striking straight back in the centre rather than letting the pawn stand unchallenged -- the most natural, principled reply to such an aggressive try.",
          "format": "markdown"
        },
        "9": {
          "note": "The critical point: this attacks the knight on d4 a second time (the queen on d8 already did, along the open file), so White has to deal with it immediately.",
          "format": "markdown"
        },
        "11": {
          "note": "Recapturing toward the queenside. The resulting doubled c-pawns are a fair, long-term price for having forced the trade on favourable terms, and the position is otherwise perfectly comfortable.",
          "format": "markdown"
        },
        "13": {
          "note": "Developing naturally; nothing about the earlier exchange changes Black's plans here.",
          "format": "markdown"
        },
        "19": {
          "note": "Developing actively. White will recapture the original c4-pawn at some point -- there was never any way to hold onto it for free in this line -- but the position stays balanced either way.",
          "format": "markdown"
        }
      },
      "variations": [
        {
          "branch_ply": 9,
          "moves": [
            "f8b4",
            "b1c3",
            "g8f6",
            "f1c4",
            "e8g8"
          ],
          "annotations": {
            "0": {
              "note": "Check first, rather than developing the other knight immediately.",
              "format": "markdown"
            },
            "1": {
              "note": "White blocks with the knight rather than the bishop -- a bishop on d2 would have sat on the queen's own defensive line to d4 and left the knight there hanging to ...Qxd4, so this way is more accurate.",
              "format": "markdown"
            },
            "2": {
              "note": "Simple development; the pin along the long diagonal isn't going anywhere, so there's no need to do anything about it yet.",
              "format": "markdown"
            },
            "4": {
              "note": "White castles, stepping off the b4-e1 diagonal and freeing the knight on c3 from the pin.",
              "format": "markdown"
            }
          }
        }
      ]
    },
    {
      "name": "Queen's Gambit Accepted: Black's Early ...Bg4",
      "side": "black",
      "eco": "D24",
      "moves": [
        "d2d4",
        "d7d5",
        "c2c4",
        "d5c4",
        "g1f3",
        "g8f6",
        "e2e3",
        "c8g4",
        "f1c4",
        "e7e6",
        "e1g1",
        "b8d7",
        "d1b3",
        "g4f3",
        "g2f3",
        "b7b6",
        "f1d1",
        "f8d6",
        "b1c3",
        "e8g8"
      ],
      "annotations": {
        "7": {
          "note": "A genuine pin, not just a developing move: with the pawn already on e3, the diagonal all the way to the queen on d1 is completely open, so the knight on f3 can't actually move.",
          "format": "markdown"
        },
        "11": {
          "note": "Developing naturally; the pin on f3 isn't going anywhere, so there's no rush to resolve it.",
          "format": "markdown"
        },
        "13": {
          "note": "Trading now rather than letting White choose the moment -- the bishop has done its job pinning the knight, and there's nothing more to gain by keeping it there once challenged in other lines.",
          "format": "markdown"
        },
        "15": {
          "note": "A necessary response, not just a useful one: White's queen on b3 attacks the undefended b7-pawn down the open b-file, so simply developing elsewhere would have dropped it. Pushing the pawn out of attack is the simplest fix.",
          "format": "markdown"
        },
        "17": {
          "note": "Completing development naturally.",
          "format": "markdown"
        }
      },
      "variations": [
        {
          "branch_ply": 8,
          "moves": [
            "h2h3",
            "g4f3",
            "d1f3",
            "e7e6",
            "f1c4",
            "b8d7"
          ],
          "annotations": {
            "0": {
              "note": "If White asks the question immediately rather than recapturing the pawn first.",
              "format": "markdown"
            },
            "1": {
              "note": "Trading rather than retreating -- there's no retreat square that avoids being chased further for no real gain, so cashing in the pin here is simplest.",
              "format": "markdown"
            }
          }
        }
      ]
    }
  ],
  "woodpecker_sets": [],
  "endgame_positions": []
}