{
 "puzzle_file": "gentle_9x9_b.json",
 "solution_length": 10,
 "moves": [
  [
   0,
   [
    0,
    1
   ]
  ],
  [
   1,
   [
    1,
    0
   ]
  ],
  [
   1,
   [
    0,
    1
   ]
  ],
  [
   1,
   [
    -1,
    0
   ]
  ],
  [
   0,
   [
    0,
    -1
   ]
  ],
  [
   0,
   [
    -1,
    0
   ]
  ],
  [
   0,
   [
    0,
    -1
   ]
  ],
  [
   0,
   [
    1,
    0
   ]
  ],
  [
   0,
   [
    -1,
    0
   ]
  ],
  [
   2,
   [
    0,
    -1
   ]
  ]
 ],
 "verified": true,
 "generator": "reverse_construction",
 "scores": {
  "witness_len": 10,
  "greedy_success": 0.0,
  "greedy_avg_len": null,
  "optimal_len": 10,
  "bfs_nodes": 24445,
  "trap_fraction": 0.0,
  "depth1_merges": 0,
  "hardness": 15.0,
  "piece_sizes": [
   1,
   1,
   1,
   1,
   1
  ],
  "max_chain_merge": 0,
  "theme": null
 }
}