{
 "grid_size": 12,
 "polyominos": [
  {
   "tiles": [
    [
     6,
     6
    ]
   ],
   "piece_type": "MOVABLE",
   "poly_id": 0,
   "color": [
    110,
    0,
    0
   ]
  },
  {
   "tiles": [
    [
     2,
     10
    ],
    [
     2,
     11
    ]
   ],
   "piece_type": "MOVABLE",
   "poly_id": 1,
   "color": [
    110,
    0,
    0
   ]
  },
  {
   "tiles": [
    [
     8,
     10
    ],
    [
     8,
     11
    ],
    [
     9,
     11
    ]
   ],
   "piece_type": "MOVABLE",
   "poly_id": 2,
   "color": [
    110,
    0,
    0
   ]
  },
  {
   "tiles": [
    [
     5,
     9
    ],
    [
     5,
     10
    ],
    [
     6,
     10
    ]
   ],
   "piece_type": "MOVABLE",
   "poly_id": 3,
   "color": [
    110,
    0,
    0
   ]
  },
  {
   "tiles": [
    [
     0,
     0
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     0,
     1
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     0,
     6
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     0,
     7
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     0,
     10
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     0,
     11
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     1,
     0
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     1,
     1
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     1,
     4
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     1,
     10
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     2,
     0
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     2,
     1
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     2,
     3
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     2,
     4
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     2,
     5
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     2,
     7
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     2,
     8
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     2,
     9
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     3,
     3
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     5,
     0
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     5,
     7
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     6,
     5
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     6,
     8
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     7,
     6
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     7,
     7
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     7,
     8
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     7,
     10
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     7,
     11
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     8,
     3
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     8,
     7
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     8,
     9
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     9,
     1
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     9,
     3
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     9,
     4
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     10,
     0
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     10,
     1
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     10,
     9
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     10,
     10
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     11,
     0
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     11,
     1
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     11,
     5
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     11,
     6
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     11,
     9
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     11,
     10
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     11,
     11
    ]
   ],
   "piece_type": "BARRIER"
  }
 ],
 "level_color": [
  110,
  0,
  0
 ],
 "meta": {
  "generator": "mutate_harden",
  "preset": "12x12/4",
  "tier": "hard",
  "seed_optimal": 16,
  "harden_seconds": 1200,
  "harden_restarts": 7,
  "hard_target": null,
  "brutal": true,
  "soft_flaws": [],
  "hard_flaws": [],
  "beautify": {
   "removed": 0,
   "filled": 5
  },
  "taste": {
   "score": 2,
   "verdict": "tidy",
   "summary": "The board is cluttered with several isolated barrier dots and fragmented clusters that make it look machine-generated rather than hand-designed.",
   "issues": [
    {
     "kind": "random_dot",
     "cells": [
      [
       6,
       5
      ]
     ],
     "note": "Lone barrier dot floating in the center of the board."
    },
    {
     "kind": "random_dot",
     "cells": [
      [
       8,
       9
      ]
     ],
     "note": "Lone barrier dot floating near the bottom right."
    },
    {
     "kind": "random_dot",
     "cells": [
      [
       5,
       7
      ]
     ],
     "note": "Lone barrier dot floating near the center."
    },
    {
     "kind": "ragged_shell",
     "cells": [
      [
       5,
       0
      ]
     ],
     "note": "Single barrier cell on the top edge creates a jagged notch."
    },
    {
     "kind": "scatter",
     "cells": [
      [
       1,
       4
      ],
      [
       2,
       3
      ],
      [
       2,
       4
      ],
      [
       2,
       5
      ],
      [
       3,
       3
      ]
     ],
     "note": "Small fragmented cluster of barriers that looks accidental."
    }
   ],
   "suggest_fill": [
    [
     5,
     1
    ]
   ],
   "suggest_remove": [
    [
     6,
     5
    ],
    [
     8,
     9
    ],
    [
     5,
     7
    ],
    [
     5,
     0
    ]
   ],
   "model": "gemma4:31b"
  },
  "space": {
   "optimal": 74,
   "states": 44220,
   "dead_frac": 0.429,
   "optimal_lines": 18795841868799105691312492,
   "progress_frac": 0.305,
   "fatal_frac": 0.109,
   "fatal_merge_frac": 0.848,
   "forced_frac": 0.176,
   "survive_random": 0.0002,
   "mean_branching": 6.96,
   "solvable_frac": 0.571,
   "min_carry": 12,
   "carry_frac": 0.162
  },
  "id": "daily_2026-10-25_hard",
  "date": "2026-10-25",
  "band": "hard",
  "difficulty_score": 2.626,
  "optimal_len": 74,
  "title": "Oct 25",
  "rev": "51511d63"
 }
}