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    "name": "Nimzowitsch Defense: Nf3",
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    "slug": "sicilian-defense",
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    "name": "King's Pawn Game: Wayward Queen Attack",
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    "name": "Petrov Defense: Nc3",
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    "name": "Vienna Game: Max Lange Defense: Nf3",
    "slug": "vienna-game-max-lange-defense-nf3",
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    "name": "Italian Game: Two Knights Defense",
    "slug": "italian-game-two-knights-defense",
    "eco": "C55",
    "white_pct_u1200": 52.9,
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  {
    "name": "King's Knight Opening: Normal Variation: Bc4",
    "slug": "king-s-knight-opening-normal-variation-bc4",
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    "name": "Two Knights Defense",
    "slug": "two-knights-defense",
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    "name": "Ruy Lopez",
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    "name": "Queen's Pawn Game: Zukertort Variation",
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    "name": "Horwitz Defense",
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    "name": "French Defense: Normal Variation",
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    "name": "Center Game Accepted",
    "slug": "center-game-accepted",
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    "name": "Hungarian Opening",
    "slug": "hungarian-opening",
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    "name": "Modern Defense",
    "slug": "modern-defense",
    "eco": "B06",
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    "name": "Modern Defense",
    "slug": "vs-modern-defense",
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    "name": "Alekhine Defense: Nc3",
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    "name": "Van Geet Opening: Reversed Nimzowitsch: e4",
    "slug": "van-geet-opening-reversed-nimzowitsch-e4",
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    "name": "Vienna Game: Falkbeer Variation",
    "slug": "vienna-game-falkbeer-variation",
    "eco": "C26",
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    "name": "Queen's Gambit Accepted",
    "slug": "queen-s-gambit-accepted",
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    "name": "Indian Defense: Nc3",
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    "name": "Owen Defense",
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    "slug": "french-defense-d4",
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    "name": "Sicilian Defense: Bowdler Attack",
    "slug": "sicilian-defense-bowdler-attack",
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    "slug": "sicilian-defense-nf3",
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    "white_pct_u1200": 48.9,
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    "slug": "sicilian-defense-old-sicilian",
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    "slug": "nimzowitsch-defense-nc3",
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    "white_pct_u1200": 49.1,
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    "name": "Vienna Game: Max Lange Defense",
    "slug": "vienna-game-max-lange-defense",
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    "name": "Van Geet Opening",
    "slug": "van-geet-opening",
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    "name": "Caro-Kann Defense: Nf3",
    "slug": "caro-kann-defense-nf3",
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    "name": "Zukertort Opening: Slav Invitation: e4",
    "slug": "zukertort-opening-slav-invitation-e4",
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  {
    "name": "Italian Game: Anti-Fried Liver Defense",
    "slug": "italian-game-anti-fried-liver-defense",
    "eco": "C50",
    "white_pct_u1200": 49.5,
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    "name": "Mieses Opening",
    "slug": "mieses-opening",
    "eco": "A00",
    "white_pct_u1200": 44.4,
    "games_u1200": 5052749,
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  {
    "name": "King's Pawn Game: McConnell Defense",
    "slug": "king-s-pawn-game-mcconnell-defense",
    "eco": "C40",
    "white_pct_u1200": 51.5,
    "games_u1200": 4959950,
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    "name": "Nimzo-Larsen Attack",
    "slug": "nimzo-larsen-attack",
    "eco": "A01",
    "white_pct_u1200": 49.1,
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    "name": "Center Game: d6",
    "slug": "center-game-d6",
    "eco": "C20",
    "white_pct_u1200": 52.6,
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    "name": "French Defense: Nf3",
    "slug": "french-defense-nf3",
    "eco": "C00",
    "white_pct_u1200": 47.3,
    "games_u1200": 4676366,
    "white_pct_r1200_1600": 46.4,
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    "name": "Zukertort Opening: Queen's Gambit Invitation: e4",
    "slug": "zukertort-opening-queen-s-gambit-invitation-e4",
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    "white_pct_u1200": 47.3,
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    "name": "King's Knight Opening: Normal Variation: Nc3",
    "slug": "king-s-knight-opening-normal-variation-nc3",
    "eco": "C44",
    "white_pct_u1200": 46.1,
    "games_u1200": 4317096,
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    "games_r1200_1600": 8170795,
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    "name": "Center Game Accepted: Qxd4",
    "slug": "center-game-accepted-qxd4",
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    "white_pct_u1200": 43.0,
    "games_u1200": 4292921,
    "white_pct_r1200_1600": 44.4,
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    "name": "Center Game: Normal Variation",
    "slug": "center-game-normal-variation",
    "eco": "C22",
    "white_pct_u1200": 43.0,
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    "white_pct_r1200_1600": 44.4,
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    "name": "Berlin Defense",
    "slug": "berlin-defense",
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    "white_pct_u1200": 52.0,
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    "white_pct_r1600_2000": 52.2,
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    "name": "Ruy Lopez: Berlin Defense",
    "slug": "ruy-lopez-berlin-defense",
    "eco": "C65",
    "white_pct_u1200": 52.0,
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    "name": "Blackmar-Diemer Gambit: e6",
    "slug": "blackmar-diemer-gambit-e6",
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    "white_pct_u1200": 49.9,
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    "white_pct_r1200_1600": 46.6,
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    "white_pct_r1600_2000": 45.1,
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    "name": "French Advance",
    "slug": "french-advance",
    "eco": "C02",
    "white_pct_u1200": 49.9,
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    "name": "French Defense: Advance Variation",
    "slug": "french-defense-advance-variation",
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    "name": "French Defense: Normal Variation: d5",
    "slug": "french-defense-normal-variation-d5",
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    "name": "French Defense: Steinitz Attack: d5",
    "slug": "french-defense-steinitz-attack-d5",
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    "name": "Petrov's Defense: Three Knights Game: Nc6",
    "slug": "petrov-s-defense-three-knights-game-nc6",
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    "white_pct_u1200": 50.0,
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    "name": "Zukertort Opening: Tennison Gambit",
    "slug": "zukertort-opening-tennison-gambit",
    "eco": "A06",
    "white_pct_u1200": 45.0,
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    "white_pct_r1600_2000": 48.8,
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    "name": "Sicilian Defense: Smith-Morra Gambit",
    "slug": "sicilian-defense-smith-morra-gambit",
    "eco": "B21",
    "white_pct_u1200": 47.6,
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    "name": "Bishop's Opening: Boi Variation",
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    "white_pct_u1200": 55.0,
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    "name": "Queen's Pawn Game: Symmetrical Variation",
    "slug": "queen-s-pawn-game-symmetrical-variation",
    "eco": "D02",
    "white_pct_u1200": 49.6,
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    "slug": "queen-s-pawn-game-modern-defense",
    "eco": "A40",
    "white_pct_u1200": 47.5,
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    "name": "Bird Opening",
    "slug": "bird-opening",
    "eco": "A02",
    "white_pct_u1200": 44.1,
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    "name": "Bird Opening",
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    "eco": "A02",
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    "name": "Ponziani Opening",
    "slug": "ponziani-opening",
    "eco": "C44",
    "white_pct_u1200": 49.6,
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    "name": "English Opening: Anglo-Scandinavian Defense: d4",
    "slug": "english-opening-anglo-scandinavian-defense-d4",
    "eco": "A10",
    "white_pct_u1200": 52.0,
    "games_u1200": 3587125,
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    "white_pct_r1600_2000": 51.2,
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    "name": "Queen's Gambit Declined",
    "slug": "queen-s-gambit-declined",
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    "white_pct_u1200": 52.0,
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    "name": "Nimzowitsch Defense: Declined Variation",
    "slug": "nimzowitsch-defense-declined-variation",
    "eco": "B00",
    "white_pct_u1200": 52.3,
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    "name": "Zukertort Opening: Nc6",
    "slug": "zukertort-opening-nc6",
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    "white_pct_u1200": 52.3,
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    "name": "Italian Game: Two Knights Defense: Ng5",
    "slug": "italian-game-two-knights-defense-ng5",
    "eco": "C55",
    "white_pct_u1200": 54.1,
    "games_u1200": 3582420,
    "white_pct_r1200_1600": 54.0,
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    "slug": "two-knights-defense-ng5",
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    "white_pct_u1200": 54.1,
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    "name": "Queen's Pawn Game: Accelerated London System: Nc6",
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    "white_pct_u1200": 52.7,
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    "white_pct_r1200_1600": 53.3,
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    "name": "Italian Game: Paris Defense",
    "slug": "italian-game-paris-defense",
    "eco": "C50",
    "white_pct_u1200": 51.9,
    "games_u1200": 3449938,
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    "name": "Queen's Gambit Declined: Marshall Defense",
    "slug": "queen-s-gambit-declined-marshall-defense",
    "eco": "D06",
    "white_pct_u1200": 52.4,
    "games_u1200": 3384454,
    "white_pct_r1200_1600": 53.1,
    "games_r1200_1600": 13561039,
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    "name": "Sicilian Defense: Modern Variations",
    "slug": "sicilian-defense-modern-variations",
    "eco": "B50",
    "white_pct_u1200": 48.2,
    "games_u1200": 3349154,
    "white_pct_r1200_1600": 47.9,
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    "name": "Zukertort Opening: Pirc Invitation: e4",
    "slug": "zukertort-opening-pirc-invitation-e4",
    "eco": "A04",
    "white_pct_u1200": 48.2,
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    "name": "Zukertort Opening: Sicilian Invitation: e4",
    "slug": "zukertort-opening-sicilian-invitation-e4",
    "eco": "A04",
    "white_pct_u1200": 48.2,
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    "white_pct_r1200_1600": 47.9,
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    "name": "Scandinavian Defense: Mieses-Kotroc Variation: Nc3",
    "slug": "scandinavian-defense-mieses-kotroc-variation-nc3",
    "eco": "B01",
    "white_pct_u1200": 53.7,
    "games_u1200": 3218937,
    "white_pct_r1200_1600": 51.5,
    "games_r1200_1600": 12804189,
    "white_pct_r1600_2000": 50.0,
    "games_r1600_2000": 14581912,
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    "games_r2000_plus": 2395725,
    "delta": -3.6
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  {
    "name": "Scandinavian Defense: Valencian Variation",
    "slug": "scandinavian-defense-valencian-variation",
    "eco": "B01",
    "white_pct_u1200": 53.7,
    "games_u1200": 3218937,
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  {
    "name": "Elephant Gambit",
    "slug": "elephant-gambit",
    "eco": "C40",
    "white_pct_u1200": 52.6,
    "games_u1200": 3135697,
    "white_pct_r1200_1600": 50.7,
    "games_r1200_1600": 5631775,
    "white_pct_r1600_2000": 46.9,
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    "games_r2000_plus": 1736539,
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  {
    "name": "Mieses Opening: Reversed Rat: e4",
    "slug": "mieses-opening-reversed-rat-e4",
    "eco": "A00",
    "white_pct_u1200": 45.6,
    "games_u1200": 3066830,
    "white_pct_r1200_1600": 47.2,
    "games_r1200_1600": 6348276,
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    "white_pct_r2000_plus": 45.1,
    "games_r2000_plus": 319230,
    "delta": -0.5
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  {
    "name": "Queen's Pawn Game: g6",
    "slug": "queen-s-pawn-game-g6",
    "eco": "A40",
    "white_pct_u1200": 49.2,
    "games_u1200": 3057292,
    "white_pct_r1200_1600": 49.3,
    "games_r1200_1600": 12418476,
    "white_pct_r1600_2000": 50.0,
    "games_r1600_2000": 20771468,
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    "games_r2000_plus": 8640026,
    "delta": -0.2
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  {
    "name": "Bishop's Opening: Bc5",
    "slug": "bishop-s-opening-bc5",
    "eco": "C23",
    "white_pct_u1200": 52.8,
    "games_u1200": 3023937,
    "white_pct_r1200_1600": 51.9,
    "games_r1200_1600": 7053142,
    "white_pct_r1600_2000": 50.9,
    "games_r1600_2000": 5123952,
    "white_pct_r2000_plus": 51.1,
    "games_r2000_plus": 352333,
    "delta": -1.7
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  {
    "name": "King's Pawn Game: c5",
    "slug": "king-s-pawn-game-c5",
    "eco": "B00",
    "white_pct_u1200": 47.1,
    "games_u1200": 2985401,
    "white_pct_r1200_1600": 46.8,
    "games_r1200_1600": 9935801,
    "white_pct_r1600_2000": 49.0,
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    "white_pct_r2000_plus": 49.7,
    "games_r2000_plus": 12934821,
    "delta": 2.6
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  {
    "name": "Sicilian Closed",
    "slug": "sicilian-closed",
    "eco": "B23",
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    "name": "Sicilian Defense: Closed",
    "slug": "sicilian-defense-closed",
    "eco": "B23",
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    "name": "Scandinavian Defense: Nf3",
    "slug": "scandinavian-defense-nf3",
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    "name": "Italian Game: Giuoco Piano: d3",
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    "name": "Italian Game: Two Knights Defense: d3",
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    "name": "King's Gambit Accepted",
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    "name": "Scandinavian Defense: Main Line",
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    "name": "Slav Defense",
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    "slug": "modern-defense-d4",
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    "name": "French Defense: Queen's Knight",
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    "white_pct_u1200": 44.7,
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    "name": "Sicilian Defense: Bowdler Attack: Nc6",
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    "name": "Ruy Lopez: Steinitz Defense",
    "slug": "ruy-lopez-steinitz-defense",
    "eco": "C62",
    "white_pct_u1200": 50.5,
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    "name": "Indian Defense: Accelerated London System: d5",
    "slug": "indian-defense-accelerated-london-system-d5",
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    "white_pct_u1200": 52.8,
    "games_u1200": 1990080,
    "white_pct_r1200_1600": 51.9,
    "games_r1200_1600": 6802099,
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    "name": "Queen's Pawn Game: Accelerated London System: Nf6",
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    "white_pct_u1200": 52.8,
    "games_u1200": 1990080,
    "white_pct_r1200_1600": 51.9,
    "games_r1200_1600": 6802099,
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    "name": "English Defense",
    "slug": "english-defense",
    "eco": "A40",
    "white_pct_u1200": 49.8,
    "games_u1200": 1970448,
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    "games_r1200_1600": 6915516,
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  {
    "name": "Queen's Gambit Accepted: Old Variation",
    "slug": "queen-s-gambit-accepted-old-variation",
    "eco": "D20",
    "white_pct_u1200": 55.2,
    "games_u1200": 1950376,
    "white_pct_r1200_1600": 56.9,
    "games_r1200_1600": 6299481,
    "white_pct_r1600_2000": 56.3,
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  {
    "name": "Dutch Defense",
    "slug": "dutch-defense",
    "eco": "A80",
    "white_pct_u1200": 50.8,
    "games_u1200": 1938245,
    "white_pct_r1200_1600": 50.7,
    "games_r1200_1600": 5558294,
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  {
    "name": "Dutch Defense",
    "slug": "vs-dutch-defense",
    "eco": "A80",
    "white_pct_u1200": 50.8,
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    "name": "King's Gambit Accepted: King's Knight's Gambit",
    "slug": "king-s-gambit-accepted-king-s-knight-s-gambit",
    "eco": "C34",
    "white_pct_u1200": 54.5,
    "games_u1200": 1888875,
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    "name": "King's Gambit: exf4",
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    "name": "Caro-Kann Defense: Bc4",
    "slug": "caro-kann-defense-bc4",
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    "white_pct_u1200": 42.9,
    "games_u1200": 1885960,
    "white_pct_r1200_1600": 43.3,
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    "name": "Zukertort Opening: Tennison Gambit: e6",
    "slug": "zukertort-opening-tennison-gambit-e6",
    "eco": "A06",
    "white_pct_u1200": 48.9,
    "games_u1200": 1885909,
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    "name": "Nimzo-Larsen Attack: e5",
    "slug": "nimzo-larsen-attack-e5",
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    "white_pct_u1200": 50.1,
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    "name": "Modern Defense: Nf3",
    "slug": "modern-defense-nf3",
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    "white_pct_u1200": 47.8,
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    "name": "French Defense: Paulsen Variation",
    "slug": "french-defense-paulsen-variation",
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    "white_pct_u1200": 49.1,
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    "name": "French Defense: Queen's Knight: d5",
    "slug": "french-defense-queen-s-knight-d5",
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    "white_pct_u1200": 49.1,
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    "name": "Queen's Pawn Game: Chigorin Variation: e6",
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    "name": "Sicilian Defense: French Variation",
    "slug": "sicilian-defense-french-variation",
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    "white_pct_u1200": 47.3,
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    "name": "Queen's Pawn Game: Accelerated London System: e6",
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    "name": "Scandinavian Defense: Modern Variation",
    "slug": "scandinavian-defense-modern-variation",
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    "name": "Scandinavian Modern",
    "slug": "scandinavian-modern",
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    "name": "Giuoco Piano",
    "slug": "giuoco-piano",
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    "white_pct_u1200": 53.6,
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    "name": "Italian Game: Bc5",
    "slug": "italian-game-bc5",
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    "white_pct_u1200": 53.6,
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    "name": "Caro-Kann Defense: Hillbilly Attack: d5",
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    "white_pct_u1200": 43.7,
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    "name": "Owen Defense: d4",
    "slug": "owen-defense-d4",
    "eco": "B00",
    "white_pct_u1200": 49.9,
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    "name": "Owen's Defense: d4",
    "slug": "owen-s-defense-d4",
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    "white_pct_u1200": 49.9,
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    "name": "Polish Opening",
    "slug": "polish-opening",
    "eco": "A00",
    "white_pct_u1200": 47.2,
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    "name": "Sokolsky Opening",
    "slug": "sokolsky-opening",
    "eco": "A00",
    "white_pct_u1200": 47.2,
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    "slug": "vs-sokolsky-opening",
    "eco": "A00",
    "white_pct_u1200": 47.2,
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    "name": "Italian Game: Giuoco Piano: O-O",
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    "white_pct_u1200": 48.3,
    "games_u1200": 1553783,
    "white_pct_r1200_1600": 49.2,
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    "white_pct_r1600_2000": 51.2,
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    "name": "Sicilian Defense: Bc4",
    "slug": "sicilian-defense-bc4",
    "eco": "B20",
    "white_pct_u1200": 44.4,
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    "name": "London System",
    "slug": "london-system",
    "eco": "D02",
    "white_pct_u1200": 52.7,
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    "white_pct_r1600_2000": 50.2,
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    "slug": "vs-london-system",
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    "white_pct_u1200": 52.7,
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    "name": "Ruy Lopez: Classical Variation",
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    "white_pct_u1200": 49.5,
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    "name": "Sicilian Defense: Closed: Nc6",
    "slug": "sicilian-defense-closed-nc6",
    "eco": "B23",
    "white_pct_u1200": 47.3,
    "games_u1200": 1492950,
    "white_pct_r1200_1600": 46.3,
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    "white_pct_r1600_2000": 46.9,
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    "name": "Queen's Gambit Declined: Queen's Knight Variation",
    "slug": "queen-s-gambit-declined-queen-s-knight-variation",
    "eco": "D31",
    "white_pct_u1200": 53.2,
    "games_u1200": 1446757,
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    "name": "Queen's Gambit: e6",
    "slug": "queen-s-gambit-e6",
    "eco": "D06",
    "white_pct_u1200": 53.2,
    "games_u1200": 1446757,
    "white_pct_r1200_1600": 52.8,
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    "white_pct_r1600_2000": 51.6,
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    "name": "Owen Defense: Nf3",
    "slug": "owen-defense-nf3",
    "eco": "B00",
    "white_pct_u1200": 49.8,
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    "games_r1200_1600": 5940933,
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    "name": "Owen's Defense: Nf3",
    "slug": "owen-s-defense-nf3",
    "eco": "B00",
    "white_pct_u1200": 49.8,
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    "games_r1200_1600": 5940933,
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    "name": "Zukertort Opening: Queenside Fianchetto Variation: e4",
    "slug": "zukertort-opening-queenside-fianchetto-variation-e4",
    "eco": "A04",
    "white_pct_u1200": 49.8,
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    "white_pct_r1200_1600": 49.5,
    "games_r1200_1600": 5940933,
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    "name": "Sicilian Defense: Bowdler Attack: d6",
    "slug": "sicilian-defense-bowdler-attack-d6",
    "eco": "B20",
    "white_pct_u1200": 48.4,
    "games_u1200": 1358465,
    "white_pct_r1200_1600": 46.9,
    "games_r1200_1600": 7407120,
    "white_pct_r1600_2000": 46.0,
    "games_r1600_2000": 8887678,
    "white_pct_r2000_plus": 45.8,
    "games_r2000_plus": 1731710,
    "delta": -2.6
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  {
    "name": "King's Pawn Game: Maróczy Defense: Nf3",
    "slug": "king-s-pawn-game-maroczy-defense-nf3",
    "eco": "B07",
    "white_pct_u1200": 50.4,
    "games_u1200": 1315997,
    "white_pct_r1200_1600": 50.5,
    "games_r1200_1600": 7098002,
    "white_pct_r1600_2000": 52.4,
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    "games_r2000_plus": 1832415,
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  {
    "name": "Philidor Defense: d4",
    "slug": "philidor-defense-d4",
    "eco": "C41",
    "white_pct_u1200": 50.4,
    "games_u1200": 1315997,
    "white_pct_r1200_1600": 50.5,
    "games_r1200_1600": 7098002,
    "white_pct_r1600_2000": 52.4,
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  {
    "name": "Philidor Defense: Exchange Variation",
    "slug": "philidor-defense-exchange-variation",
    "eco": "C41",
    "white_pct_u1200": 50.4,
    "games_u1200": 1315997,
    "white_pct_r1200_1600": 50.5,
    "games_r1200_1600": 7098002,
    "white_pct_r1600_2000": 52.4,
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    "name": "Caro-Kann Defense: Exchange Variation",
    "slug": "caro-kann-defense-exchange-variation",
    "eco": "B13",
    "white_pct_u1200": 47.4,
    "games_u1200": 1314464,
    "white_pct_r1200_1600": 47.9,
    "games_r1200_1600": 5278681,
    "white_pct_r1600_2000": 47.9,
    "games_r1600_2000": 12887176,
    "white_pct_r2000_plus": 47.4,
    "games_r2000_plus": 6871734,
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  {
    "name": "Caro-Kann: Exchange Variation",
    "slug": "caro-kann-exchange-variation",
    "eco": "B13",
    "white_pct_u1200": 47.4,
    "games_u1200": 1314464,
    "white_pct_r1200_1600": 47.9,
    "games_r1200_1600": 5278681,
    "white_pct_r1600_2000": 47.9,
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    "games_r2000_plus": 6871734,
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  {
    "name": "Sicilian Defense: Open",
    "slug": "sicilian-defense-open",
    "eco": "B32",
    "white_pct_u1200": 51.5,
    "games_u1200": 1307251,
    "white_pct_r1200_1600": 50.3,
    "games_r1200_1600": 11135626,
    "white_pct_r1600_2000": 49.0,
    "games_r1600_2000": 29367881,
    "white_pct_r2000_plus": 47.9,
    "games_r2000_plus": 12697039,
    "delta": -3.6
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  {
    "name": "French Defense: Exchange Variation",
    "slug": "french-defense-exchange-variation",
    "eco": "C01",
    "white_pct_u1200": 48.5,
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    "white_pct_u1200": 48.9,
    "games_u1200": 396516,
    "white_pct_r1200_1600": 48.7,
    "games_r1200_1600": 3740728,
    "white_pct_r1600_2000": 47.7,
    "games_r1600_2000": 12303184,
    "white_pct_r2000_plus": 47.9,
    "games_r2000_plus": 9864214,
    "delta": -1.0
  },
  {
    "name": "Indian Defense: Normal Variation: e6",
    "slug": "indian-defense-normal-variation-e6",
    "eco": "A50",
    "white_pct_u1200": 50.9,
    "games_u1200": 369342,
    "white_pct_r1200_1600": 50.5,
    "games_r1200_1600": 3928115,
    "white_pct_r1600_2000": 49.2,
    "games_r1600_2000": 12706505,
    "white_pct_r2000_plus": 48.3,
    "games_r2000_plus": 8864112,
    "delta": -2.6
  },
  {
    "name": "French Defense: Franco-Sicilian Defense: Nf3",
    "slug": "french-defense-franco-sicilian-defense-nf3",
    "eco": "C00",
    "white_pct_u1200": 47.1,
    "games_u1200": 299509,
    "white_pct_r1200_1600": 46.9,
    "games_r1200_1600": 3619686,
    "white_pct_r1600_2000": 46.0,
    "games_r1600_2000": 12085501,
    "white_pct_r2000_plus": 45.8,
    "games_r2000_plus": 8193074,
    "delta": -1.3
  },
  {
    "name": "Sicilian Defense: French Variation: d4",
    "slug": "sicilian-defense-french-variation-d4",
    "eco": "B40",
    "white_pct_u1200": 47.1,
    "games_u1200": 299509,
    "white_pct_r1200_1600": 46.9,
    "games_r1200_1600": 3619686,
    "white_pct_r1600_2000": 46.0,
    "games_r1600_2000": 12085501,
    "white_pct_r2000_plus": 45.8,
    "games_r2000_plus": 8193074,
    "delta": -1.3
  },
  {
    "name": "Sicilian Defense: French Variation, Open",
    "slug": "sicilian-defense-french-variation-open",
    "eco": "B40",
    "white_pct_u1200": 47.1,
    "games_u1200": 299509,
    "white_pct_r1200_1600": 46.9,
    "games_r1200_1600": 3619686,
    "white_pct_r1600_2000": 46.0,
    "games_r1600_2000": 12085501,
    "white_pct_r2000_plus": 45.8,
    "games_r2000_plus": 8193074,
    "delta": -1.3
  }
]