{"content":"I'm creating an extremely difficult challenge that combines multiple complex pattern types requiring advanced regex techniques. This challenge includes:\n1. Valid IPv6 addresses (with shortened sections and mixed case) among similar invalid formats\n2. Product codes that follow specific patterns but have tricky variations\n3. Data timestamps in multiple formats where only specific valid ones should match\n4. Credit card numbers with proper checksums hidden among similar invalid numbers\n5. Special characters that need careful escaping and boundaries that are difficult to define precisely\nThe regex solver will need to use negative lookaheads/lookbehinds, non-capturing groups, proper boundary detection, and precise character class definitions to solve this.","function_call":{"name":"make_move","arguments":"{\"reasoning\": \"I'm creating an extremely difficult challenge that combines multiple complex pattern types requiring advanced regex techniques. This challenge includes:\... (truncated)