{
 "grid_size": 12,
 "polyominos": [
  {
   "tiles": [
    [
     0,
     8
    ]
   ],
   "piece_type": "MOVABLE",
   "poly_id": 0,
   "color": [
    100,
    0,
    100
   ]
  },
  {
   "tiles": [
    [
     3,
     3
    ],
    [
     4,
     3
    ]
   ],
   "piece_type": "MOVABLE",
   "poly_id": 1,
   "color": [
    100,
    0,
    100
   ]
  },
  {
   "tiles": [
    [
     8,
     10
    ],
    [
     8,
     11
    ],
    [
     9,
     11
    ]
   ],
   "piece_type": "MOVABLE",
   "poly_id": 2,
   "color": [
    100,
    0,
    100
   ]
  },
  {
   "tiles": [
    [
     2,
     7
    ],
    [
     2,
     8
    ],
    [
     3,
     8
    ]
   ],
   "piece_type": "MOVABLE",
   "poly_id": 3,
   "color": [
    100,
    0,
    100
   ]
  },
  {
   "tiles": [
    [
     0,
     3
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     0,
     4
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     0,
     5
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     0,
     10
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     1,
     1
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     1,
     4
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     1,
     5
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     1,
     6
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     1,
     10
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     2,
     9
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     2,
     10
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     3,
     10
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     4,
     0
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     4,
     4
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     4,
     5
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     4,
     6
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     4,
     8
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     4,
     9
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     5,
     0
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     5,
     2
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     5,
     6
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     5,
     8
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     6,
     0
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     6,
     5
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     6,
     9
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     6,
     11
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     7,
     3
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     7,
     6
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     7,
     9
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     8,
     2
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     8,
     9
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     9,
     3
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     9,
     4
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     9,
     5
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     9,
     6
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     10,
     3
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     11,
     5
    ]
   ],
   "piece_type": "BARRIER"
  }
 ],
 "level_color": [
  100,
  0,
  100
 ],
 "meta": {
  "generator": "mutate_harden",
  "preset": "12x12/4",
  "tier": "hard",
  "seed_optimal": 21,
  "harden_seconds": 186,
  "harden_restarts": 2,
  "hard_target": 36,
  "brutal": false,
  "soft_flaws": [],
  "hard_flaws": [],
  "beautify": {
   "removed": 1,
   "filled": 3
  },
  "taste": {
   "score": 2,
   "verdict": "tidy",
   "summary": "The board contains too many isolated single-cell barriers that look like random noise; removing these 'dots' cleans up the layout significantly.",
   "issues": [
    {
     "kind": "random_dot",
     "cells": [
      [
       1,
       1
      ]
     ],
     "note": "Lone barrier dot floating near the top-left corner."
    },
    {
     "kind": "random_dot",
     "cells": [
      [
       5,
       2
      ]
     ],
     "note": "Isolated barrier dot in the upper-middle area."
    },
    {
     "kind": "random_dot",
     "cells": [
      [
       8,
       2
      ]
     ],
     "note": "Isolated barrier dot in the upper-right area."
    },
    {
     "kind": "random_dot",
     "cells": [
      [
       7,
       3
      ]
     ],
     "note": "Isolated barrier dot."
    },
    {
     "kind": "random_dot",
     "cells": [
      [
       6,
       5
      ]
     ],
     "note": "Isolated barrier dot."
    },
    {
     "kind": "random_dot",
     "cells": [
      [
       7,
       6
      ]
     ],
     "note": "Isolated barrier dot."
    },
    {
     "kind": "scatter",
     "cells": [
      [
       5,
       2
      ],
      [
       8,
       2
      ],
      [
       7,
       3
      ],
      [
       6,
       5
      ],
      [
       7,
       6
      ]
     ],
     "note": "Too many single-cell islands create a 'noise' effect rather than a deliberate layout."
    }
   ],
   "suggest_fill": [],
   "suggest_remove": [
    [
     1,
     1
    ],
    [
     5,
     2
    ],
    [
     8,
     2
    ],
    [
     7,
     3
    ],
    [
     6,
     5
    ],
    [
     7,
     6
    ]
   ],
   "model": "gemma4:31b"
  },
  "space": {
   "optimal": 36,
   "states": 50508,
   "dead_frac": 0.646,
   "optimal_lines": 10149383040,
   "progress_frac": 0.226,
   "fatal_frac": 0.202,
   "fatal_merge_frac": 0.927,
   "forced_frac": 0.472,
   "survive_random": 0.0006,
   "mean_branching": 7.0,
   "solvable_frac": 0.354,
   "min_carry": 4,
   "carry_frac": 0.111
  },
  "id": "daily_2026-10-29_hard",
  "date": "2026-10-29",
  "band": "hard",
  "difficulty_score": 0.881,
  "optimal_len": 36,
  "title": "Oct 29",
  "rev": "66039f6a"
 }
}