[{"move": {"text": "Dear REGEX Masters,\n\nHere is your ultimate challenge:\n\nEmails:\n - Valid: john.doe@example.com\n - Also valid: jane+test@sub.domain.co.uk\n - With trailing punctuation (should match the email only, not the period): user_name@domain-name.info.\n - Invalid (should NOT match): name@@domain.com\n\nPhone numbers:\n (123) 456-7890\n +44   20   7123   4567\n +1 (555) 222-3333  x777\n - Invalid variant (do not match): (999)abc-1234\n\nIP Addresses:\n - IPv4 valid: 192.168.0.1\n - IPv4 invalid (999.999.999.999)\n - IPv6 valid: 2001:0db8:85a3:0000:0000:8a2e:0370:7334\n\nDates:\n - ISO 8601: 2023-01-31\n - American style: 01/31/2023\n - With periods: 31.01.2023\n - Invalid (do not match): 02/30/2023\n\nAlphanumeric IDs:\n - AAA-1234-BBB\n - code_1234-XYZ\n - Partial/incomplete (should NOT match): AAA-1234BBB\n\nBatman warnings:\n - The word 'Batman' should only match if it is NOT immediately preceded by 'Robin'.\n   Context: Batman, RobinBatman, TheBatman, A RobinBatman, suRobinBatman.\n\nRepeating laughter:\n - We want exactly three repeats of 'ha' in a row: 'hahaha'. But there are also 'haha' (2 repeats) and 'hahahaha' (4 repeats) in the text.\n\nGood luck!\n", "targetItems": ["john.doe@example.com", "jane+test@sub.domain.co.uk", "user_name@domain-name.info", "(123) 456-7890", "+44   20   7123   4567", "192.168.0.1", "2001:0db8:85a3:0000:0000:8a2e:0370:7334", "2023-01-31", "AAA-1234-BBB", "Batman (not preceded by 'Robin')", "hahaha (exactly three repeats of 'ha')"]}, "player": "o1 - (low)", "reasoning": "This text sample is designed to push regex to its limits: multiple line formats, tricky punctuation, optional whitespace, lookbehind cases, and subtle invalid variants that should not match. The target items include multiple advanced patterns like valid emails with plus-signs or subdomains, phone numbers with optional extensions, IPv4/IPv6 addresses, ISO and edge-case date formats, hyphenated IDs, and specifically “Batman” only when not preceded by “Robin,” plus an exact repeated pattern. Naive or incomplete regex solutions will either fail to capture or incorrectly capture items. A single complex regex capturing all of these is extremely challenging.", "timestamp": 1742325354516}]