{"content":"I'm creating an exceptionally difficult challenge that combines:\n1. Complex nested structures with multiple special characters requiring precise escaping\n2. Mixed format dates with similar-looking non-dates as traps\n3. Scientific notation numbers with variable formats\n4. IPv6 addresses with different valid representations\n5. Base64-like strings with specific patterns\n6. Nested parenthetical expressions with balanced delimiters\n7. Similar-looking patterns that require precise matching\nThis will require careful handling of special characters, lookarounds, balanced groups, and precise pattern matching while avoiding false positives.","function_call":{"name":"make_move","arguments":"{\"reasoning\": \"I'm creating an exceptionally difficult challenge that combines:\\n1. Complex nested structures with multiple special characters requiring precise escaping\\n2. Mixed format dates with similar-looking non-dates as traps\\n3. Scientific notation numbers with variable formats... (truncated)