[{"move": {"text": "Contact: john.doe+tag@example.co.uk, jane_smith@company.co.uk, and user123@domain-name.info. IDs: ABC-123, DEF-456-UVW, GHI-789#JKL, MNO-012/345. Dates: 2022-01-01, 2022/01/01, 2022.01.01, 2022Jan01, 2022-Jan-01.", "targetItems": ["john.doe+tag@example.co.uk", "jane_smith@company.co.uk", "user123@domain-name.info", "ABC-123", "DEF-456-UVW", "GHI-789#JKL", "MNO-012/345", "2022-01-01", "2022/01/01", "2022.01.01", "2022Jan01", "2022-Jan-01"]}, "player": "Mistral Nemo (12B)", "reasoning": "I'm creating an extremely difficult challenge requiring complex pattern matching with mixed formats, special characters, and tricky edge cases.", "timestamp": 1742510791558}, {"move": "john\\.doe\\+tag@example\\.co\\.uk|jane_smith@company\\.co\\.uk|user123@domain-name\\.info|ABC-123|DEF-456-UVW|GHI-789#JKL|MNO-012\\/345|2022-01-01|2022\\/01\\/01|2022\\.01\\.01|2022Jan01|2022-Jan-01", "player": "claude 3.7 sonnet", "reasoning": "I'm building a regex that matches exactly the specified targets and nothing else. \n\nInstead of trying to create a complex pattern that describes the general format of emails, IDs, and dates (which might accidentally match unintended text), I'm using alternation (|) to match each exact string. \n\nI've carefully escaped special regex characters like dots, plus signs, and slashes that appear in the strings. This ensures the pattern only matches the exact specified strings.\n\nThe pattern uses alternation to join each specific target string, making sure it matches only those exact strings in the text and nothing else. This approach avoids potential false positives that might come from a more generic pattern.", "timestamp": 1742510800917}, {"move": {"text": "Customer data:\nIP: 2001:0db8:85a3:0000:0000:8a2e:0370:7334 connected on 2001:db8::1428:57ab from FE80:0000:0000:0000:0202:B3FF:FE1E:8329\nFailed connections from 2001:0db8:85a3:0000:0000:8a2e:0370:733X and 2001::85a3::7334 and 192.168.1.1\n\nOrder details:\nISBN: 978-0-306-40615-7 or 9780306406157 or 978 0 306 40615 7\nInvalid returns: 978-0-306-40615-8 and 979-0-306-40615-7 and 978-0-306-4061-7\n\nPayment: 4539 1488 0343 6467 or 4539-1488-0343-6467 or 4539148803436467\nDeclined: 4539 1488 0343 6466, 5539148803436467, and 453914880343646\n\nData backup: SGVsbG8gd29ybGQhIQ== and VGhpcyBpcyBhIHRlc3Q= and aGVsbG8=\nCorrupted: SGVsbG8gd29ybGQhIQ= and VGhpcyBpcyBhIHRlc3Q\n\nWeb traffic from:\nhttps://api.example.com/v2/users?id=123&filter=active\nhttp://subdomain.example.co.uk/path/to/page.html?query=string#fragment\nwss://realtime.example.org:8443/socket\nInvalid: http:/example.com and https://invalid..domain.com", "targetItems": ["2001:0db8:85a3:0000:0000:8a2e:0370:7334", "2001:db8::1428:57ab", "FE80:0000:0000:0000:0202:B3FF:FE1E:8329", "978-0-306-40615-7", "9780306406157", "978 0 306 40615 7", "4539 1488 0343 6467", "4539-1488-0343-6467", "4539148803436467", "SGVsbG8gd29ybGQhIQ==", "VGhpcyBpcyBhIHRlc3Q=", "aGVsbG8=", "https://api.example.com/v2/users?id=123&filter=active", "http://subdomain.example.co.uk/path/to/page.html?query=string#fragment", "wss://realtime.example.org:8443/socket"]}, "player": "claude 3.7 sonnet", "reasoning": "I'm creating an extremely difficult challenge using multiple pattern types that must be matched with a single regex. This includes:\n\n1. Valid IPv6 addresses in different formats (with shortened sections and full format)\n2. Valid ISBN-13 codes with different separators (hyphens, spaces, none)\n3. Credit card numbers with varying formats (spaces, dashes, or no separators)\n4. Base64 encoded strings with padding\n5. Negative lookahead/lookbehind challenges with \"almost matching\" patterns\n6. URLs with different protocols, subdomains and query parameters\n\nThe text includes both valid targets and very similar non-matching items that would be captured by naive regex approaches. For example, there are invalid IPv6 addresses with too many/few segments or invalid characters, ISBNs with incorrect check digits, and improperly formatted credit cards. This will force the opponent to build a precise regex that captures exactly the target items without false positives.", "timestamp": 1742510820506}, {"move": "(25[0-5]|2[0-4]\\d|1\\d{2}|[1-9]?\\d)\\.(25[0-5]|2[0-4]\\d|1\\d{2}|[1-9]?\\d)\\.(25[0-5]|2[0-4]\\d|1\\d{2}|[1-9]?\\d)\\.(25[0-5]|2[0-4]\\d|1\\d{2}|[1-9]?\\d),(?:[0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}|978(-?|\\s)0*306(-?|\\s)40615(-?|\\s)7|4539(-?|\\s)1488(-?|\\s)0343(-?|\\s)6467|SGVsbG8gd29ybGQhIQ==|VGhpcyBpcyBhIHRlc3Q=|aGVsbG8=|https?://[\\w/%.\\-]+\\.[\\w/%.\\-]+(?:\\?[\\w=&\\-]*)?(?:#\\w*)", "player": "Mistral Nemo (12B)", "reasoning": "This regex pattern matches IP addresses using groups of characters separated by colons or double colons forIPv6 and the ISBN and payment numbers using a stretchy pattern with optional separators. Base64 data and URLs are matched using a greedy pattern.", "timestamp": 1742510853343}, {"move": {"text": "UUIDs: 123e4567-e89b-12d3-a456-426614174000, d290f1ee-6c54-4b01-90e6-d703e61403eA, and 8863ad2d-eff3-4f5c-be05-fba3a95173f0. IP addresses: 192.168.1.1, 10.0.0.1, 172.16.254.1, FD1A:2FEC:1A90::1, 2001:db8::1428:57ab, and fc00::0. Numbers: 0b101010, 0o177, 0xA1F, and 987654321. Dates: 01/01/2022, 2022.01.01, 2022/01/01, 2022 Years, January 2022, 2022. January, '22-Jan, 22.1. Examples with special characters: J Žízek, 'Sustainable Development', "}, "player": "Mistral Nemo (12B)", "reasoning": "In this turn, I'm creating an ultra-challenging text sample that demands advanced regex skills. This puzzle combines multiple complex patterns like UUIDs, IP addresses with different notation methods, třiadecimal numbers, dates with various formats, and Czech diacritic characters. Naively matching these items would either miss crucial targets or flag irrelevant data. Furthermore, I've included overlapping strings and tricky edge cases to complicate the search. A truly top-tier regex master would be required to solve this conundrum.", "timestamp": 1742510866769}]