{
  "schema_version": "1.0",
  "generator": {
    "name": "PlayChessOnline Position Review Generator",
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    "generated_at_utc": "2026-10-12T14:06:57.898598+00:00",
    "runtime_seconds": 12.774132,
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    "platform": "Windows-10-10.0.19045-SP0"
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    "slug": "shrivastava-marri-princeton",
    "title": "Nivaan Shrivastava vs Pranav Reddy Marri - castling into a central break",
    "source": {
      "label": "Lichess Princeton National Chess Day Open broadcast",
      "url": "https://lichess.org/broadcast/princeton-national-chess-day-open/round-5/vc0HDyNf/7TIV6ftS"
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            },
            "nodes": 250661,
            "depth": 15,
            "seldepth": 28
          },
          {
            "move": {
              "uci": "f6e4",
              "san": "Nxe4"
            },
            "is_played_move": false,
            "is_engine_best_move": false,
            "selected_by_models": [
              "V15 Endgame",
              "V18 Defensive",
              "V6 Active"
            ],
            "score": {
              "centipawns": -487,
              "is_mate": false,
              "mate_in": null,
              "comparison_cp": -487
            },
            "loss_cp": 362,
            "within_100cp": false,
            "within_200cp": false,
            "pv": {
              "uci": [
                "f6e4",
                "d3e4",
                "c6e4",
                "e1e4",
                "h7h6",
                "g5h4",
                "b6c5",
                "d2e2",
                "f8e7",
                "h4e7",
                "e8e7",
                "g2g4",
                "h8d8",
                "f4f5",
                "d6d5",
                "e4e5",
                "b5b4",
                "c3d5",
                "e7f8",
                "f5e6",
                "f7e6"
              ],
              "san": "12...Nxe4 13. Bxe4 Bxe4 14. Rxe4 h6 15. Bh4 Qc5 16. Qe2 Be7 17. Bxe7 Kxe7 18. g4 Rhd8 19. f5 d5 20. Re5 b4 21. Nxd5+ Kf8 22. fxe6 fxe6"
            },
            "nodes": 250300,
            "depth": 18,
            "seldepth": 30
          }
        ]
      }
    },
    {
      "id": "choice-13-white",
      "label": "White to move on move 13",
      "fen": "2kr1b1r/5ppp/pqbppn2/1p4B1/4PP2/2NB4/PPPQ2PP/2KRR3 w - - 4 13",
      "side_to_move": "white",
      "legal_move_count": 31,
      "played_move": {
        "uci": "e4e5",
        "san": "e5"
      },
      "model_consensus": {
        "distinct_top_moves": 1,
        "most_selected_move": {
          "uci": "g5f6",
          "san": "Bxf6"
        },
        "most_selected_count": 6
      },
      "public_choice_gate": {
        "required_distinct_safe_model_moves": 3,
        "safety_threshold_cp": 100,
        "observed_distinct_model_moves": 1,
        "safe_distinct_model_moves": 0,
        "passes": false
      },
      "models": [
        {
          "key": "v6_active",
          "label": "V6 Active",
          "intended_profile": "active, initiative-seeking",
          "top_move": {
            "uci": "g5f6",
            "san": "Bxf6",
            "hybrid_score_cp": 223.863715
          },
          "top_three": [
            {
              "uci": "g5f6",
              "san": "Bxf6",
              "hybrid_score_cp": 223.863715
            },
            {
              "uci": "d3b5",
              "san": "Bxb5",
              "hybrid_score_cp": 78.238533
            },
            {
              "uci": "c3b5",
              "san": "Nxb5",
              "hybrid_score_cp": 78.155138
            }
          ]
        },
        {
          "key": "v8_sharp",
          "label": "V8 Sharp",
          "intended_profile": "sharp club-player profile on curated data",
          "top_move": {
            "uci": "g5f6",
            "san": "Bxf6",
            "hybrid_score_cp": 227.489725
          },
          "top_three": [
            {
              "uci": "g5f6",
              "san": "Bxf6",
              "hybrid_score_cp": 227.489725
            },
            {
              "uci": "c3b5",
              "san": "Nxb5",
              "hybrid_score_cp": 79.70876
            },
            {
              "uci": "d3b5",
              "san": "Bxb5",
              "hybrid_score_cp": 79.651194
            }
          ]
        },
        {
          "key": "v9_positional",
          "label": "V9 Positional",
          "intended_profile": "calm positional pressure",
          "top_move": {
            "uci": "g5f6",
            "san": "Bxf6",
            "hybrid_score_cp": 227.524666
          },
          "top_three": [
            {
              "uci": "g5f6",
              "san": "Bxf6",
              "hybrid_score_cp": 227.524666
            },
            {
              "uci": "c3b5",
              "san": "Nxb5",
              "hybrid_score_cp": 79.337185
            },
            {
              "uci": "d3b5",
              "san": "Bxb5",
              "hybrid_score_cp": 79.160039
            }
          ]
        },
        {
          "key": "v15_endgame",
          "label": "V15 Endgame",
          "intended_profile": "endgame-focused distilled evaluator",
          "top_move": {
            "uci": "g5f6",
            "san": "Bxf6",
            "hybrid_score_cp": 228.831563
          },
          "top_three": [
            {
              "uci": "g5f6",
              "san": "Bxf6",
              "hybrid_score_cp": 228.831563
            },
            {
              "uci": "c3b5",
              "san": "Nxb5",
              "hybrid_score_cp": 72.47584
            },
            {
              "uci": "d3b5",
              "san": "Bxb5",
              "hybrid_score_cp": 72.446991
            }
          ]
        },
        {
          "key": "v17_file_pressure",
          "label": "V17 File Pressure",
          "intended_profile": "open-file and rook-pressure weighting",
          "top_move": {
            "uci": "g5f6",
            "san": "Bxf6",
            "hybrid_score_cp": 227.386121
          },
          "top_three": [
            {
              "uci": "g5f6",
              "san": "Bxf6",
              "hybrid_score_cp": 227.386121
            },
            {
              "uci": "c3b5",
              "san": "Nxb5",
              "hybrid_score_cp": 80.036836
            },
            {
              "uci": "d3b5",
              "san": "Bxb5",
              "hybrid_score_cp": 79.965596
            }
          ]
        },
        {
          "key": "v18_defensive",
          "label": "V18 Defensive",
          "intended_profile": "defensive tension and counterpunch weighting",
          "top_move": {
            "uci": "g5f6",
            "san": "Bxf6",
            "hybrid_score_cp": 224.287109
          },
          "top_three": [
            {
              "uci": "g5f6",
              "san": "Bxf6",
              "hybrid_score_cp": 224.287109
            },
            {
              "uci": "c3b5",
              "san": "Nxb5",
              "hybrid_score_cp": 79.981416
            },
            {
              "uci": "d3b5",
              "san": "Bxb5",
              "hybrid_score_cp": 79.922268
            }
          ]
        }
      ],
      "stockfish": {
        "best_move": {
          "uci": "e4e5",
          "san": "e5"
        },
        "best_score": {
          "centipawns": 210,
          "is_mate": false,
          "mate_in": null,
          "comparison_cp": 210
        },
        "best_pv": {
          "uci": [
            "e4e5",
            "b5b4",
            "c3e4",
            "h7h6",
            "g5h4",
            "f6e4",
            "h4d8",
            "c8d8",
            "d3e4",
            "d6d5",
            "f4f5",
            "d8c7",
            "e4f3",
            "f8c5",
            "f3h5",
            "h8f8",
            "c1b1",
            "a6a5",
            "d2d3",
            "a5a4",
            "d3g3",
            "a4a3",
            "g3g7"
          ],
          "san": "13. e5 b4 14. Ne4 h6 15. Bh4 Nxe4 16. Bxd8 Kxd8 17. Bxe4 d5 18. f5 Kc7 19. Bf3 Bc5 20. Bh5 Rf8 21. Kb1 a5 22. Qd3 a4 23. Qg3 a3 24. Qxg7"
        },
        "nodes": 250086,
        "depth": 16,
        "seldepth": 26,
        "verified_choices": [
          {
            "move": {
              "uci": "e4e5",
              "san": "e5"
            },
            "is_played_move": true,
            "is_engine_best_move": true,
            "selected_by_models": [],
            "score": {
              "centipawns": 209,
              "is_mate": false,
              "mate_in": null,
              "comparison_cp": 209
            },
            "loss_cp": 0,
            "within_100cp": true,
            "within_200cp": true,
            "pv": {
              "uci": [
                "e4e5",
                "b5b4",
                "c3e4",
                "f6e4",
                "g5d8",
                "c8d8",
                "d3e4",
                "d6d5",
                "f4f5",
                "a6a5",
                "d2f4",
                "a5a4",
                "f5e6",
                "f7e6",
                "f4g4",
                "d8c7",
                "e4d3"
              ],
              "san": "13. e5 b4 14. Ne4 Nxe4 15. Bxd8 Kxd8 16. Bxe4 d5 17. f5 a5 18. Qf4 a4 19. fxe6 fxe6 20. Qg4 Kc7 21. Bd3"
            },
            "nodes": 250357,
            "depth": 15,
            "seldepth": 28
          },
          {
            "move": {
              "uci": "g5f6",
              "san": "Bxf6"
            },
            "is_played_move": false,
            "is_engine_best_move": false,
            "selected_by_models": [
              "V15 Endgame",
              "V17 File Pressure",
              "V18 Defensive",
              "V6 Active",
              "V8 Sharp",
              "V9 Positional"
            ],
            "score": {
              "centipawns": 32,
              "is_mate": false,
              "mate_in": null,
              "comparison_cp": 32
            },
            "loss_cp": 178,
            "within_100cp": false,
            "within_200cp": true,
            "pv": {
              "uci": [
                "g5f6"
              ],
              "san": "13. Bxf6"
            },
            "nodes": 250478,
            "depth": 17,
            "seldepth": 21
          }
        ]
      }
    }
  ],
  "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."
  ]
}