{
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    "generated_at_utc": "2026-09-19T07:08:25.847130+00:00",
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    "platform": "Windows-10-10.0.19045-SP0"
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  "review": {
    "slug": "yang-gao-victorian-championship",
    "title": "Yang vs Gao: Defend Before the Attack Lands",
    "source": {
      "label": "Melbourne Chess Club: 2026 Victorian Championship",
      "url": "https://www.melbournechessclub.org/2026victorianchampionship",
      "game_url": "https://lichess.org/broadcast/2026-victorian-championship-premier/round-1/KbUwWrbg/e0eDrf3Q",
      "pgn_url": "https://lichess.org/api/broadcast/round/KbUwWrbg.pgn"
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      "fen": "1r3r1k/3b3p/1q1p1p2/p2B2b1/R4N1P/1P2n3/2PQ2P1/1N2R2K b - - 0 25",
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        {
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    {
      "id": "choice-27",
      "label": "Black to move on move 27",
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        {
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            "uci": "h6f4",
            "san": "Bxf4",
            "hybrid_score_cp": 358.315512
          },
          "top_three": [
            {
              "uci": "h6f4",
              "san": "Bxf4",
              "hybrid_score_cp": 358.315512
            },
            {
              "uci": "b6b3",
              "san": "Qxb3",
              "hybrid_score_cp": 200.937473
            },
            {
              "uci": "a4b3",
              "san": "Bxb3",
              "hybrid_score_cp": 200.885516
            }
          ]
        },
        {
          "key": "v15_endgame",
          "label": "V15 Endgame",
          "intended_profile": "endgame-focused distilled evaluator",
          "top_move": {
            "uci": "h6f4",
            "san": "Bxf4",
            "hybrid_score_cp": 353.397079
          },
          "top_three": [
            {
              "uci": "h6f4",
              "san": "Bxf4",
              "hybrid_score_cp": 353.397079
            },
            {
              "uci": "a4b3",
              "san": "Bxb3",
              "hybrid_score_cp": 200.703423
            },
            {
              "uci": "b6b3",
              "san": "Qxb3",
              "hybrid_score_cp": 200.684384
            }
          ]
        },
        {
          "key": "v17_file_pressure",
          "label": "V17 File Pressure",
          "intended_profile": "open-file and rook-pressure weighting",
          "top_move": {
            "uci": "h6f4",
            "san": "Bxf4",
            "hybrid_score_cp": 359.212354
          },
          "top_three": [
            {
              "uci": "h6f4",
              "san": "Bxf4",
              "hybrid_score_cp": 359.212354
            },
            {
              "uci": "b6b3",
              "san": "Qxb3",
              "hybrid_score_cp": 200.668134
            },
            {
              "uci": "a4b3",
              "san": "Bxb3",
              "hybrid_score_cp": 200.56716
            }
          ]
        },
        {
          "key": "v18_defensive",
          "label": "V18 Defensive",
          "intended_profile": "defensive tension and counterpunch weighting",
          "top_move": {
            "uci": "h6f4",
            "san": "Bxf4",
            "hybrid_score_cp": 364.310647
          },
          "top_three": [
            {
              "uci": "h6f4",
              "san": "Bxf4",
              "hybrid_score_cp": 364.310647
            },
            {
              "uci": "b6b3",
              "san": "Qxb3",
              "hybrid_score_cp": 202.854948
            },
            {
              "uci": "a4b3",
              "san": "Bxb3",
              "hybrid_score_cp": 202.527187
            }
          ]
        }
      ],
      "stockfish": {
        "best_move": {
          "uci": "a4e8",
          "san": "Be8"
        },
        "best_score": {
          "centipawns": -209,
          "is_mate": false,
          "mate_in": null,
          "comparison_cp": -209
        },
        "best_pv": {
          "uci": [
            "a4e8",
            "f4g6"
          ],
          "san": "27...Be8 28. Ng6+"
        },
        "nodes": 250226,
        "depth": 14,
        "seldepth": 31,
        "verified_choices": [
          {
            "move": {
              "uci": "h6f4",
              "san": "Bxf4"
            },
            "is_played_move": true,
            "is_engine_best_move": false,
            "selected_by_models": [
              "V15 Endgame",
              "V17 File Pressure",
              "V18 Defensive",
              "V6 Active",
              "V8 Sharp",
              "V9 Positional"
            ],
            "score": {
              "centipawns": -486,
              "is_mate": false,
              "mate_in": null,
              "comparison_cp": -486
            },
            "loss_cp": 277,
            "within_100cp": false,
            "within_200cp": false,
            "pv": {
              "uci": [
                "h6f4",
                "d2f4",
                "b6d8",
                "f4e4",
                "d8e7",
                "e4e7",
                "b8e8",
                "e7a7",
                "e8e1",
                "h1h2",
                "a4e8",
                "b1d2",
                "e1e5",
                "a7d4",
                "e5d5",
                "d4d5",
                "e8f7",
                "d5d4"
              ],
              "san": "27...Bxf4 28. Qxf4 Qd8 29. Qe4 Qxe7 30. Qxe7 Rbe8 31. Qa7 Re1+ 32. Kh2 Be8 33. Nd2 Re5 34. Qd4 Rxd5 35. Qxd5 Bf7 36. Qd4"
            },
            "nodes": 250070,
            "depth": 13,
            "seldepth": 23
          }
        ]
      }
    }
  ],
  "limitations": [
    "The six neural checkpoints are scalar evaluators, not move-policy models or explanation models.",
    "Their 768 inputs encode piece placement only; side to move is applied after inference, while castling rights, en-passant state, repetition, move history, and clocks are not model inputs.",
    "Profile labels describe intended training or runtime behavior and do not prove human-like personality or internal understanding.",
    "Stockfish results use a fixed node budget and configuration and are a verification snapshot, not a claim of perfect play.",
    "Stockfish was required to use two search threads. Parallel search can produce small score, depth, node-count, or PV differences on a fresh rerun even when the configured node limit is unchanged.",
    "Centipawn loss uses a 100,000 cp comparison value for forced-mate scores; mate status and mate distance are also reported separately.",
    "The analysis does not measure Elo, playing strength, or clean unseen test accuracy.",
    "Any reader-facing move explanation must describe observable chess features; it must not be presented as the model's internal reasoning."
  ]
}