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{"type":"item.completed","item":{"id":"item_2","type":"agent_message","text":"```python\nimport numpy as np,json\nfrom collections import Counter\nexec(open(\"/work/rules_analysis.py\").read())\n\ndef area_margin(board,colour):\n    score=int(np.sum(board==1)-np.sum(board==-1))\n    empty=set(map(int,np.flatnonzero(board==0)))\n    while empty:\n        seed=next(iter(empty)); empty.remove(seed)\n        region={seed}; stack=[seed]; boundary=set()\n        while stack:\n            for j in neighbors(stack.pop()):\n                if board[j]==0 and j in empty:\n                    empty.remove(j); region.add(j); stack.append(j)\n                elif board[j]!=0:\n                    boundary.add(int(board[j]))\n        if boundary=={1}: score+=len(region)\n        if boundary=={-1}: score-=len(region)\n    return colour*(score-7.5)\n\ngames=json.load(open(\"/work/pass_14/games.json\"))\nboards=np.load(\"/work/pass_14/boards.npy\")\nstats=Counter(); examples=[]\nfor gi,g in enumerate(games):\n    if g[\"opponent\"]!=\"strong\":continue\n    col=1 if g[\"net_color\"]==\"black\" else -1\n    passes=[m for m in g[\"moves\"] if m[\"by\"]==\"net\" and m[\"move\"]==81]\n    if not passes:continue\n    first=passes[0]; ply=first[\"ply\"]\n    margin=area_margin(boards[gi,ply],col)\n    stats[(\"first_pass_ahead\",margin>0,\"won\",g[\"result\"]==1)]+=1\n    if g[\"result\"]==-1:\n        examples.append((margin-g[\"margin\"],gi,first,margin))\nprint(\"First-pass positions versus eventual outcomes:\",dict(stats))\nfor swing,gi,first,margin in sorted(examples,reverse=True)[:5]:\n    g=games[gi];ply=first[\"ply\"]\n    print(\"\\nGAME\",gi,{k:v for k,v in g.items() if k!=\"moves\"})\n    print(\"First net pass: ply\",ply,\"actual area margin then\",margin)\n    print(first)\n    print(\"Board:\",json.dumps(board_strings(boards[gi,ply])))\n    print(\"Following moves:\",g[\"moves\"][ply+1:ply+9])\n\nprint(\"\\nLoss-margin distribution:\",\n      sorted(g[\"margin\"] for g in games if g[\"opponent\"]==\"strong\" and g[\"result\"]<0))\n```\n"}}
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