{"content":"I'm designing an extremely difficult challenge that combines multiple complex pattern types with tricky edge cases. This challenge includes:\n1. Valid IPv4 and IPv6 addresses mixed with similar-looking invalid ones\n2. Credit card numbers with specific format requirements (including spaces, dashes, or nothing between groups)\n3. Complex URLs with various protocols, parameters, and fragments\n4. Date formats in multiple standards (ISO, US, EU) with different separators\n5. Valid hex color codes (both 3 and 6 digits) with variations\n6. Custom code identifiers with specific validation rules\n\nThe challenge requires handling many special characters, backreferences, lookaheads, and careful boundary matching to avoid false positives from the intentionally similar distractor patterns.","function_call":{"name":"make_move","arguments":"{\"reasoning\": \"I'm designing an extremely difficult challenge that combines multiple complex pattern types with tricky edge cases. This challeng... (truncated)