{"content":"I'm creating an extremely difficult challenge that spans a wide variety of complex patterns. The text sample includes advanced email formats with special characters and subdomains, multiple phone number formats (with parentheses, hyphens, and dots), dates in various formats (using different separators and order), IDs that require precise matching and backreference usage, nested HTML elements with attributes, both IPv4 and IPv6 addresses (challenging numeric constraints and shorthand notation), a log entry with timestamp and error text, a compact JSON snippet, and a version string with an optional qualifier. This challenge forces the use of advanced regex features such as alternation, grouping, negative lookahead/lookbehind, and backreferences, making it significantly more advanced than previous challenges.","function_call":{"name":"make_move","arguments":"{\"reasoning\": \"I'm creating an extremely difficult challenge that spans a wide variety of complex patterns. The text ... (truncated)