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{"type":"item.completed","item":{"id":"item_2","type":"agent_message","text":"```python\n# A symmetric four-four opening develops a corner while retaining central\n# influence. This changes only Black's very first move.\nw=load(\"out.W\")\nstars=[(3,3),(3,5),(5,3),(5,5)]\nfor q in range(81):\n    r,c=divmod(q,9)\n    distance=min(abs(r-a)+abs(c-b) for a,b in stars)\n    w[493,q]=-14.4*distance\nsave(\"out.W\",w)\nprint(\"Empty-board prior: equal, symmetric four-four openings.\")\n```\n"}}
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