{"content":"I'm creating an extremely difficult challenge that incorporates numerous regex edge cases and advanced pattern matching requirements. This challenge includes:\n1. Palindromic IPv6 addresses (requiring precise formatting recognition)\n2. Credit card numbers with specific validation patterns\n3. Custom product codes with complex format requirements\n4. Time expressions with AM/PM variations and timezone offsets\n5. URLs with query parameters that must be matched exactly\n6. Base64 encoded strings with specific patterns\n7. Valid JSON snippets\n8. SHA-256 hashes that are palindromes\n9. Negative examples that are very close to valid patterns but should be excluded\n\nThis will require careful use of lookaheads, lookbehinds, backreferences, precise character class definitions, and boundary assertions to match correctly without false positives.","function_call":{"name":"make_move","arguments":"{\"reasoning\": \"I'm creating an extremely difficult challenge that incorporates nume... (truncated)