{
 "grid_size": 9,
 "polyominos": [
  {
   "tiles": [
    [
     3,
     1
    ]
   ],
   "piece_type": "MOVABLE",
   "poly_id": 0,
   "color": [
    100,
    80,
    60
   ]
  },
  {
   "tiles": [
    [
     0,
     7
    ],
    [
     0,
     8
    ]
   ],
   "piece_type": "MOVABLE",
   "poly_id": 1,
   "color": [
    100,
    80,
    60
   ]
  },
  {
   "tiles": [
    [
     1,
     4
    ],
    [
     2,
     3
    ],
    [
     2,
     4
    ]
   ],
   "piece_type": "MOVABLE",
   "poly_id": 2,
   "color": [
    100,
    80,
    60
   ]
  },
  {
   "tiles": [
    [
     2,
     7
    ],
    [
     3,
     7
    ],
    [
     4,
     7
    ]
   ],
   "piece_type": "MOVABLE",
   "poly_id": 3,
   "color": [
    100,
    80,
    60
   ]
  },
  {
   "tiles": [
    [
     0,
     4
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     1,
     0
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     1,
     5
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     2,
     0
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     2,
     5
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     2,
     8
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     3,
     0
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     3,
     4
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     5,
     3
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     6,
     0
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     6,
     3
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     6,
     5
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     6,
     6
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     7,
     0
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     7,
     2
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     7,
     3
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     7,
     4
    ]
   ],
   "piece_type": "BARRIER"
  },
  {
   "tiles": [
    [
     7,
     5
    ]
   ],
   "piece_type": "BARRIER"
  }
 ],
 "level_color": [
  100,
  80,
  60
 ],
 "meta": {
  "generator": "random_boards",
  "preset": "9x9/4",
  "tier": "easy",
  "seed": 5180370,
  "floor": 11,
  "soft_flaws": [],
  "hard_flaws": [],
  "taste": {
   "score": 2,
   "verdict": "tidy",
   "summary": "The board has several fragmented barrier pieces and a thin gap along the right edge that makes the layout feel accidental rather than designed.",
   "issues": [
    {
     "kind": "ragged_shell",
     "cells": [
      [
       0,
       4
      ]
     ],
     "note": "Lone barrier cell on the left edge creates a jagged notch."
    },
    {
     "kind": "random_dot",
     "cells": [
      [
       3,
       4
      ]
     ],
     "note": "Isolated barrier dot in the middle of the board."
    },
    {
     "kind": "scatter",
     "cells": [
      [
       1,
       5
      ],
      [
       2,
       5
      ]
     ],
     "note": "Small fragment of barrier floating near the left side."
    },
    {
     "kind": "near_miss",
     "cells": [
      [
       7,
       2
      ],
      [
       7,
       3
      ],
      [
       7,
       4
      ],
      [
       7,
       5
      ]
     ],
     "note": "The barrier structure on the right is very close to the shell but doesn't touch it, creating a thin gap."
    }
   ],
   "suggest_fill": [
    [
     0,
     3
    ],
    [
     0,
     5
    ],
    [
     8,
     2
    ],
    [
     8,
     3
    ],
    [
     8,
     4
    ],
    [
     8,
     5
    ]
   ],
   "suggest_remove": [
    [
     3,
     4
    ],
    [
     1,
     5
    ],
    [
     2,
     5
    ]
   ],
   "model": "gemma4:31b"
  },
  "space": {
   "optimal": 11,
   "states": 47324,
   "dead_frac": 0.407,
   "optimal_lines": 132,
   "progress_frac": 0.281,
   "fatal_frac": 0.124,
   "fatal_merge_frac": 0.306,
   "forced_frac": 0.091,
   "survive_random": 0.249,
   "mean_branching": 8.09,
   "solvable_frac": 0.593,
   "min_carry": 1,
   "carry_frac": 0.091
  },
  "id": "daily_2026-10-21_easy",
  "date": "2026-10-21",
  "band": "easy",
  "difficulty_score": -0.765,
  "optimal_len": 11,
  "title": "Oct 21",
  "rev": "2fc1499f"
 }
}