{
 "grid_size": 9,
 "polyominos": [
  {
   "tiles": [
    [
     4,
     3
    ],
    [
     5,
     3
    ]
   ],
   "piece_type": "MOVABLE",
   "poly_id": 0,
   "color": [
    0,
    110,
    0
   ]
  },
  {
   "tiles": [
    [
     2,
     7
    ],
    [
     2,
     8
    ]
   ],
   "piece_type": "MOVABLE",
   "poly_id": 1,
   "color": [
    0,
    110,
    0
   ]
  },
  {
   "tiles": [
    [
     5,
     8
    ],
    [
     6,
     8
    ],
    [
     7,
     8
    ]
   ],
   "piece_type": "MOVABLE",
   "poly_id": 2,
   "color": [
    0,
    110,
    0
   ]
  },
  {
   "tiles": [
    [
     0,
     6
    ],
    [
     1,
     5
    ],
    [
     1,
     6
    ]
   ],
   "piece_type": "MOVABLE",
   "poly_id": 3,
   "color": [
    0,
    110,
    0
   ]
  },
  {
   "tiles": [
    [
     2,
     1
    ],
    [
     2,
     2
    ],
    [
     2,
     3
    ]
   ],
   "piece_type": "MOVABLE",
   "poly_id": 4,
   "color": [
    0,
    110,
    0
   ]
  },
  {
   "tiles": [
    [
     0,
     1
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     1,
     1
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     1,
     2
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     1,
     3
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     3,
     2
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     4,
     2
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     4,
     6
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     4,
     7
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     4,
     8
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     5,
     2
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     5,
     4
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     5,
     6
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     6,
     2
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     8,
     5
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     8,
     6
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     8,
     7
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     8,
     8
    ]
   ],
   "piece_type": "BARRIER"
  }
 ],
 "level_color": [
  0,
  110,
  0
 ],
 "meta": {
  "generator": "random_boards",
  "preset": "9x9/5",
  "tier": "medium",
  "seed": 5179266,
  "floor": 12,
  "soft_flaws": [],
  "hard_flaws": [],
  "taste": {
   "score": 3,
   "verdict": "tidy",
   "summary": "The board has a generally clean layout, but a single floating barrier dot at [5, 4] looks like machine-generated noise and should be removed.",
   "issues": [
    {
     "kind": "random_dot",
     "cells": [
      [
       5,
       4
      ]
     ],
     "note": "Lone barrier dot floating in the middle of the board without a clear structural purpose."
    },
    {
     "kind": "near_miss",
     "cells": [
      [
       4,
       6
      ],
      [
       4,
       7
      ],
      [
       4,
       8
      ],
      [
       5,
       6
      ]
     ],
     "note": "The barrier group at the bottom center is very close to the right-side shell wall, creating a narrow 2-cell corridor that looks slightly accidental."
    }
   ],
   "suggest_fill": [],
   "suggest_remove": [
    [
     5,
     4
    ]
   ],
   "model": "gemma4:31b"
  },
  "space": {
   "optimal": 17,
   "states": 25089,
   "dead_frac": 0.884,
   "optimal_lines": 10710,
   "progress_frac": 0.22,
   "fatal_frac": 0.354,
   "fatal_merge_frac": 0.938,
   "forced_frac": 0.529,
   "survive_random": 0.0009,
   "mean_branching": 7.47,
   "solvable_frac": 0.116
  },
  "id": "daily_2026-10-06_medium",
  "date": "2026-10-06",
  "band": "medium",
  "difficulty_score": -0.185,
  "optimal_len": 17,
  "title": "Oct 6",
  "rev": "203c6de3"
 }
}