{
  "schema_version": "1.0",
  "generator": {
    "name": "PlayChessOnline Position Review Generator",
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    "generated_at_utc": "2026-10-26T08:07:30.843997+00:00",
    "runtime_seconds": 10.155033,
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    "platform": "Windows-10-10.0.19045-SP0"
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  "review": {
    "slug": "keetman-van-arkel-amsterdam",
    "title": "Maaike Keetman vs Rogier van Arkel: three decisions in a winning attack",
    "source": {
      "label": "Amsterdam Chess Open 2026 public Lichess broadcast",
      "url": "https://lichess.org/broadcast/amsterdam-chess-open-2026-group-a/round-6/1ujjsnvk/bS8IPFro"
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      "label": "White to move on move 37",
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        {
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        {
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          ]
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        {
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                "b3e6"
              ],
              "san": "37. Qd5 Qxb3 38. Qxb3 Bxb3 39. Rxc6 Kb7 40. Nb4 a5 41. Rc8 axb4 42. axb4 Ka6 43. d8=R Bxd8 44. Rxd8 Be6"
            },
            "nodes": 250339,
            "depth": 18,
            "seldepth": 33
          },
          {
            "move": {
              "uci": "d7d8q",
              "san": "d8=Q+"
            },
            "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": 839,
              "is_mate": false,
              "mate_in": null,
              "comparison_cp": 839
            },
            "loss_cp": 0,
            "within_100cp": true,
            "within_200cp": true,
            "pv": {
              "uci": [
                "d7d8q",
                "c6d8",
                "c7e7",
                "d8b7",
                "e7f7",
                "b2e5",
                "f7f8",
                "a4e8",
                "f8e8",
                "e5e8",
                "a6c7",
                "a8b8",
                "c7e8",
                "g7g5",
                "d1d7",
                "a7a6",
                "d7c7",
                "b8a8",
                "f2f3",
                "a8a7",
                "g1h2",
                "g5g4",
                "f3g4"
              ],
              "san": "37. d8=Q+ Nxd8 38. Rxe7 Nb7 39. Rxf7 Qxe5 40. Rf8+ Be8 41. Rxe8+ Qxe8 42. Nc7+ Kb8 43. Nxe8 g5 44. Qd7 a6 45. Qc7+ Ka8 46. f3 Ka7 47. Kh2 g4 48. fxg4"
            },
            "nodes": 250416,
            "depth": 18,
            "seldepth": 35
          }
        ]
      }
    },
    {
      "id": "last-chance-38",
      "label": "White to move on move 38",
      "fen": "k7/p1RPbpp1/Npn4p/3Qqp1P/b7/PN6/5PP1/6K1 w - - 0 38",
      "side_to_move": "white",
      "legal_move_count": 38,
      "played_move": {
        "uci": "c7c6",
        "san": "Rxc6"
      },
      "model_consensus": {
        "distinct_top_moves": 1,
        "most_selected_move": {
          "uci": "d5e5",
          "san": "Qxe5"
        },
        "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": "d5e5",
            "san": "Qxe5",
            "hybrid_score_cp": 643.284531
          },
          "top_three": [
            {
              "uci": "d5e5",
              "san": "Qxe5",
              "hybrid_score_cp": 643.284531
            },
            {
              "uci": "d7d8q",
              "san": "d8=Q+",
              "hybrid_score_cp": 577.326089
            },
            {
              "uci": "d7d8r",
              "san": "d8=R+",
              "hybrid_score_cp": 312.630475
            }
          ]
        },
        {
          "key": "v8_sharp",
          "label": "V8 Sharp",
          "intended_profile": "sharp club-player profile on curated data",
          "top_move": {
            "uci": "d5e5",
            "san": "Qxe5",
            "hybrid_score_cp": 651.947585
          },
          "top_three": [
            {
              "uci": "d5e5",
              "san": "Qxe5",
              "hybrid_score_cp": 651.947585
            },
            {
              "uci": "d7d8q",
              "san": "d8=Q+",
              "hybrid_score_cp": 584.963245
            },
            {
              "uci": "d7d8r",
              "san": "d8=R+",
              "hybrid_score_cp": 317.120136
            }
          ]
        },
        {
          "key": "v9_positional",
          "label": "V9 Positional",
          "intended_profile": "calm positional pressure",
          "top_move": {
            "uci": "d5e5",
            "san": "Qxe5",
            "hybrid_score_cp": 652.936835
          },
          "top_three": [
            {
              "uci": "d5e5",
              "san": "Qxe5",
              "hybrid_score_cp": 652.936835
            },
            {
              "uci": "d7d8q",
              "san": "d8=Q+",
              "hybrid_score_cp": 585.841858
            },
            {
              "uci": "d7d8r",
              "san": "d8=R+",
              "hybrid_score_cp": 317.453624
            }
          ]
        },
        {
          "key": "v15_endgame",
          "label": "V15 Endgame",
          "intended_profile": "endgame-focused distilled evaluator",
          "top_move": {
            "uci": "d5e5",
            "san": "Qxe5",
            "hybrid_score_cp": 683.41062
          },
          "top_three": [
            {
              "uci": "d5e5",
              "san": "Qxe5",
              "hybrid_score_cp": 683.41062
            },
            {
              "uci": "d7d8q",
              "san": "d8=Q+",
              "hybrid_score_cp": 612.288211
            },
            {
              "uci": "d7d8r",
              "san": "d8=R+",
              "hybrid_score_cp": 327.956119
            }
          ]
        },
        {
          "key": "v17_file_pressure",
          "label": "V17 File Pressure",
          "intended_profile": "open-file and rook-pressure weighting",
          "top_move": {
            "uci": "d5e5",
            "san": "Qxe5",
            "hybrid_score_cp": 651.826035
          },
          "top_three": [
            {
              "uci": "d5e5",
              "san": "Qxe5",
              "hybrid_score_cp": 651.826035
            },
            {
              "uci": "d7d8q",
              "san": "d8=Q+",
              "hybrid_score_cp": 584.973499
            },
            {
              "uci": "d7d8r",
              "san": "d8=R+",
              "hybrid_score_cp": 317.95103
            }
          ]
        },
        {
          "key": "v18_defensive",
          "label": "V18 Defensive",
          "intended_profile": "defensive tension and counterpunch weighting",
          "top_move": {
            "uci": "d5e5",
            "san": "Qxe5",
            "hybrid_score_cp": 638.235077
          },
          "top_three": [
            {
              "uci": "d5e5",
              "san": "Qxe5",
              "hybrid_score_cp": 638.235077
            },
            {
              "uci": "d7d8q",
              "san": "d8=Q+",
              "hybrid_score_cp": 573.178925
            },
            {
              "uci": "d7d8r",
              "san": "d8=R+",
              "hybrid_score_cp": 311.5168
            }
          ]
        }
      ],
      "stockfish": {
        "best_move": {
          "uci": "d7d8r",
          "san": "d8=R+"
        },
        "best_score": {
          "centipawns": null,
          "is_mate": true,
          "mate_in": 14,
          "comparison_cp": 99986
        },
        "best_pv": {
          "uci": [
            "d7d8r",
            "e7d8",
            "c7c8",
            "a8b7",
            "b3c5",
            "b6c5",
            "a6c5",
            "b7b6",
            "c5a4",
            "b6a6",
            "c8c6",
            "d8b6",
            "a4c5",
            "a6a5",
            "d5e5",
            "a5b5",
            "c6c8",
            "b5c4",
            "c5a4",
            "c4d3",
            "a4b2",
            "d3d2",
            "e5c3",
            "d2e2",
            "c8e8",
            "b6e3",
            "e8e3"
          ],
          "san": "38. d8=R+ Bxd8 39. Rc8+ Kb7 40. Nbc5+ bxc5 41. Nxc5+ Kb6 42. Nxa4+ Ka6 43. Rxc6+ Bb6 44. Nc5+ Ka5 45. Qxe5 Kb5 46. Rc8 Kc4 47. Na4+ Kd3 48. Nb2+ Kd2 49. Qc3+ Ke2 50. Re8+ Be3 51. Rxe3#"
        },
        "nodes": 250713,
        "depth": 29,
        "seldepth": 28,
        "verified_choices": [
          {
            "move": {
              "uci": "c7c6",
              "san": "Rxc6"
            },
            "is_played_move": true,
            "is_engine_best_move": false,
            "selected_by_models": [],
            "score": {
              "centipawns": -246,
              "is_mate": false,
              "mate_in": null,
              "comparison_cp": -246
            },
            "loss_cp": 100232,
            "within_100cp": false,
            "within_200cp": false,
            "pv": {
              "uci": [
                "c7c6",
                "e5d5",
                "a6c7",
                "a8b7",
                "c7d5",
                "b7c6",
                "d5e7",
                "c6d7",
                "e7f5",
                "a4b3",
                "f5g7",
                "b3c2",
                "g1f1"
              ],
              "san": "38. Rxc6 Qxd5 39. Nc7+ Kb7 40. Nxd5 Kxc6 41. Nxe7+ Kxd7 42. Nxf5 Bxb3 43. Nxg7 Bc2 44. Kf1"
            },
            "nodes": 250547,
            "depth": 14,
            "seldepth": 52
          },
          {
            "move": {
              "uci": "d5e5",
              "san": "Qxe5"
            },
            "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": 550,
              "is_mate": false,
              "mate_in": null,
              "comparison_cp": 550
            },
            "loss_cp": 99436,
            "within_100cp": false,
            "within_200cp": false,
            "pv": {
              "uci": [
                "d5e5",
                "c6e5",
                "c7c8",
                "a8b7",
                "b3c5",
                "b6c5",
                "a6c5",
                "b7b6",
                "c5a4",
                "b6b7",
                "d7d8q",
                "e7d8",
                "c8d8",
                "b7c6",
                "d8c8",
                "c6d7",
                "c8c1",
                "d7e7",
                "f2f4",
                "e5d3",
                "c1c7",
                "e7e8",
                "c7a7"
              ],
              "san": "38. Qxe5 Nxe5 39. Rc8+ Kb7 40. Nbc5+ bxc5 41. Nxc5+ Kb6 42. Nxa4+ Kb7 43. d8=Q Bxd8 44. Rxd8 Kc6 45. Rc8+ Kd7 46. Rc1 Ke7 47. f4 Nd3 48. Rc7+ Ke8 49. Rxa7"
            },
            "nodes": 250243,
            "depth": 14,
            "seldepth": 38
          }
        ]
      }
    }
  ],
  "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."
  ]
}