{"content":"I'm creating an exceptionally difficult challenge that combines:\n1. Complex nested structures requiring balanced grouping\n2. Mixed formats with subtle differences between valid/invalid matches\n3. Items requiring negative lookahead/lookbehind to avoid false matches\n4. Special characters that need careful escaping\n5. Items with optional components and variable whitespace\n6. Patterns that would break naive approaches through carefully crafted edge cases","function_call":{"name":"make_move","arguments":"{\"reasoning\": \"I'm creating an exceptionally difficult challenge that combines:\\n1. Complex nested structures requiring balanced grouping\\n2. Mixed formats with subtle differences between valid/invalid matches\\n3. Items requiring negative lookahead/lookbehind to avoid false matches\\n4. Special characters that need careful escaping\\n5. Items with optional components and variable whitespace\\n6. Patterns that would break naive approaches through carefully crafted edg... (truncated)