{
 "grid_size": 11,
 "polyominos": [
  {
   "tiles": [
    [
     0,
     7
    ]
   ],
   "piece_type": "MOVABLE",
   "poly_id": 0,
   "color": [
    110,
    0,
    0
   ]
  },
  {
   "tiles": [
    [
     2,
     7
    ],
    [
     2,
     8
    ]
   ],
   "piece_type": "MOVABLE",
   "poly_id": 1,
   "color": [
    110,
    0,
    0
   ]
  },
  {
   "tiles": [
    [
     0,
     0
    ],
    [
     0,
     1
    ]
   ],
   "piece_type": "MOVABLE",
   "poly_id": 2,
   "color": [
    110,
    0,
    0
   ]
  },
  {
   "tiles": [
    [
     1,
     5
    ],
    [
     1,
     6
    ],
    [
     2,
     5
    ]
   ],
   "piece_type": "MOVABLE",
   "poly_id": 3,
   "color": [
    110,
    0,
    0
   ]
  },
  {
   "tiles": [
    [
     5,
     8
    ],
    [
     6,
     7
    ],
    [
     6,
     8
    ],
    [
     6,
     9
    ]
   ],
   "piece_type": "MOVABLE",
   "poly_id": 4,
   "color": [
    110,
    0,
    0
   ]
  },
  {
   "tiles": [
    [
     0,
     9
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     0,
     10
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     1,
     8
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     1,
     9
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     1,
     10
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     2,
     0
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     2,
     9
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     3,
     6
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     3,
     7
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     3,
     9
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     4,
     6
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     4,
     7
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     4,
     8
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     4,
     9
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     5,
     4
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     5,
     6
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     5,
     7
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     5,
     9
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     6,
     4
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     6,
     5
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     6,
     6
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     7,
     4
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     7,
     5
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     8,
     2
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     8,
     3
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     8,
     5
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     8,
     7
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     9,
     5
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     10,
     0
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     10,
     1
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     10,
     2
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     10,
     3
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     10,
     10
    ]
   ],
   "piece_type": "BARRIER"
  }
 ],
 "level_color": [
  110,
  0,
  0
 ],
 "meta": {
  "generator": "mutate_harden",
  "preset": "11x11/5",
  "tier": "hard",
  "seed_optimal": 24,
  "harden_seconds": 179,
  "harden_restarts": 2,
  "hard_target": 32,
  "soft_flaws": [],
  "hard_flaws": [],
  "beautify": {
   "removed": 0,
   "filled": 2
  },
  "taste": {
   "score": 3,
   "verdict": "tidy",
   "summary": "The board has a strong central structure, but several stray barrier fragments and a small notch on the top edge make it look slightly machine-generated.",
   "issues": [
    {
     "kind": "random_dot",
     "cells": [
      [
       8,
       7
      ]
     ],
     "note": "Lone barrier dot floating in the lower-right quadrant."
    },
    {
     "kind": "near_miss",
     "cells": [
      [
       8,
       2
      ],
      [
       8,
       3
      ]
     ],
     "note": "Small vertical barrier island is very close to the right shell wall."
    },
    {
     "kind": "ragged_shell",
     "cells": [
      [
       2,
       0
      ]
     ],
     "note": "Single barrier cell at the top edge creates a small notch."
    }
   ],
   "suggest_fill": [
    [
     9,
     2
    ],
    [
     9,
     3
    ],
    [
     1,
     0
    ]
   ],
   "suggest_remove": [
    [
     8,
     7
    ]
   ],
   "model": "gemma4:31b"
  },
  "space": {
   "optimal": 40,
   "states": 947255,
   "dead_frac": 0.902,
   "optimal_lines": 312751202400,
   "progress_frac": 0.166,
   "fatal_frac": 0.418,
   "fatal_merge_frac": 0.966,
   "forced_frac": 0.55,
   "survive_random": 0.0,
   "mean_branching": 8.72,
   "solvable_frac": 0.098
  },
  "id": "daily_2026-10-18_hard",
  "date": "2026-10-18",
  "band": "hard",
  "difficulty_score": 1.073,
  "optimal_len": 40,
  "title": "Oct 18",
  "rev": "44bc9a58"
 }
}