{
  "teacher": {
    "uci_name": "Stockfish 19",
    "author": "the Stockfish developers (see AUTHORS file)",
    "binary": "/Users/avewright/.local/bin/stockfish-19",
    "binary_sha256": "a18534ee5eab7de770692a1219e477b31a98f90555431df44e16ea2373a0a6e1",
    "source_revision": "edb0d9db6731067ec50ce619ff372b463bc4dd5d",
    "eval_file": "nn-1a298aa575a0.nnue",
    "options_sample": {
      "Debug Log File": "<empty>",
      "NumaPolicy": "auto",
      "Threads": "1",
      "Hash": "16",
      "Clear Hash": "None",
      "Ponder": "False",
      "MultiPV": "1",
      "Skill Level": "20",
      "Move Overhead": "10",
      "nodestime": "0",
      "UCI_Chess960": "False",
      "UCI_LimitStrength": "False",
      "UCI_Elo": "1320",
      "UCI_ShowWDL": "False",
      "SyzygyPath": "<empty>",
      "SyzygyProbeDepth": "1",
      "Syzygy50MoveRule": "True",
      "SyzygyProbeLimit": "7",
      "EvalFile": "nn-1a298aa575a0.nnue"
    }
  },
  "ref_nodes": 200000,
  "tau": 120.0,
  "n_positions": 24,
  "results": [
    {
      "multipv": 4,
      "nodes": 10000,
      "n": 24,
      "ok": 24.0,
      "top1_agree": 0.7083333333333334,
      "mean_ref_regret": 9.583333333333334,
      "missing_from_ref_frac": 0.0,
      "mean_wdl_l1": 0.07566666116084282,
      "mean_kl_union": 3.7855704800687344,
      "mean_ref_mass_in_cand": 0.7548376044431203,
      "mean_cand_mass_in_ref": 0.9939698676355894,
      "pos_per_s": 100.13687644055202,
      "cpu_hours_per_m": 2.7739808515266136
    },
    {
      "multipv": 8,
      "nodes": 10000,
      "n": 24,
      "ok": 24.0,
      "top1_agree": 0.7083333333333334,
      "mean_ref_regret": 21.166666666666668,
      "missing_from_ref_frac": 0.0,
      "mean_wdl_l1": 0.20008333500785133,
      "mean_kl_union": 0.8684439572793098,
      "mean_ref_mass_in_cand": 0.9521822196285873,
      "mean_cand_mass_in_ref": 0.9547828581252986,
      "pos_per_s": 95.53525036609891,
      "cpu_hours_per_m": 2.9075945968981145
    },
    {
      "multipv": 4,
      "nodes": 30000,
      "n": 24,
      "ok": 24.0,
      "top1_agree": 0.7083333333333334,
      "mean_ref_regret": 8.958333333333334,
      "missing_from_ref_frac": 0.0,
      "mean_wdl_l1": 0.06624999851434647,
      "mean_kl_union": 3.4402265123647062,
      "mean_ref_mass_in_cand": 0.7740375049274538,
      "mean_cand_mass_in_ref": 0.9998676129009519,
      "pos_per_s": 42.89222711427767,
      "cpu_hours_per_m": 6.476179869086654
    },
    {
      "multipv": 8,
      "nodes": 30000,
      "n": 24,
      "ok": 24.0,
      "top1_agree": 0.7083333333333334,
      "mean_ref_regret": 16.041666666666668,
      "missing_from_ref_frac": 0.0,
      "mean_wdl_l1": 0.0659999949032984,
      "mean_kl_union": 1.3954533095739654,
      "mean_ref_mass_in_cand": 0.9153079674546459,
      "mean_cand_mass_in_ref": 0.9476138756570359,
      "pos_per_s": 47.4585769399225,
      "cpu_hours_per_m": 5.853057459548667
    },
    {
      "multipv": 4,
      "nodes": 100000,
      "n": 24,
      "ok": 24.0,
      "top1_agree": 0.7916666666666666,
      "mean_ref_regret": 3.875,
      "missing_from_ref_frac": 0.0,
      "mean_wdl_l1": 0.06308333602889131,
      "mean_kl_union": 3.5288753508182964,
      "mean_ref_mass_in_cand": 0.7684809324253562,
      "mean_cand_mass_in_ref": 0.9913854703109273,
      "pos_per_s": 14.21829696199435,
      "cpu_hours_per_m": 19.536642012772738
    },
    {
      "multipv": 8,
      "nodes": 100000,
      "n": 24,
      "ok": 24.0,
      "top1_agree": 0.8333333333333334,
      "mean_ref_regret": 1.2083333333333333,
      "missing_from_ref_frac": 0.0,
      "mean_wdl_l1": 0.05558333394583315,
      "mean_kl_union": 0.4347638921773056,
      "mean_ref_mass_in_cand": 0.974178055570917,
      "mean_cand_mass_in_ref": 0.9781231031312837,
      "pos_per_s": 15.056857144780269,
      "cpu_hours_per_m": 18.448589576615227
    }
  ],
  "chosen": {
    "multipv": 8,
    "nodes": 100000,
    "n": 24,
    "ok": 24.0,
    "top1_agree": 0.8333333333333334,
    "mean_ref_regret": 1.2083333333333333,
    "missing_from_ref_frac": 0.0,
    "mean_wdl_l1": 0.05558333394583315,
    "mean_kl_union": 0.4347638921773056,
    "mean_ref_mass_in_cand": 0.974178055570917,
    "mean_cand_mass_in_ref": 0.9781231031312837,
    "pos_per_s": 15.056857144780269,
    "cpu_hours_per_m": 18.448589576615227
  },
  "source_compare": {
    "relabel_labels_per_s": 97.31648477219929,
    "selfplay_labels_per_s": 96.59328945228332,
    "n": 16,
    "note": "same 10k/MultiPV=4 label cost; self-play also spends play-search plies in generate"
  },
  "threshold": {
    "top1_agree": 0.8,
    "mean_ref_regret": 20.0,
    "missing_from_ref_frac": 0.25,
    "note": "regret is ref(best) - ref(cand_pick) on a clean engine; hash cleared per search"
  },
  "hash_policy": "Clear Hash before every bench search; candidate engine isolated from reference",
  "fen_limitations": "4-field key only; no repetition/halfmove in cache rows"
}