{"content":"I'm creating an extremely difficult regex challenge that combines multiple advanced pattern types that would be challenging to match with a single regex pattern. This challenge includes:\n\n1. Look-alike patterns with subtle differences that need to be distinguished\n2. Nested structures with balanced delimiters \n3. Items requiring negative lookahead/lookbehind\n4. Custom formats with conditional validation rules\n5. Patterns with special regex metacharacters that need careful escaping\n6. Items that appear valid but have deliberate validation violations\n7. Complex formats mixing different notations and standards\n8. Items with overlapping patterns but different semantic meanings\n\nThis should force the use of advanced regex techniques like lookarounds, balanced groups, backreferences, and complex alternation patterns. The text also contains many similar-looking items that aren't in the target list, creating potential false positives.","function_call":{"name":"make_move"... (truncated)