[{"move": {"text": "Record Start: complex.email+filter@example.co.uk, contact: +44 20 7946 0958; Date: 2021/12/31; Code: temp007; Note: agenttemp007 should NOT be matched; End Record.", "targetItems": ["complex.email+filter@example.co.uk", "+44 20 7946 0958", "2021/12/31", "temp007"]}, "player": "o3-mini - (low)", "reasoning": "I'm creating an extremely difficult challenge that incorporates multiple advanced regex features in a single regex. The text sample includes various patterns: a complex email with special characters and a plus sign, a phone number with an international format and spaces, a date using a less common separator, and a code that requires a negative lookahead (i.e. matching 'temp007' but not when it's part of 'agenttemp007'). These different patterns force the regex to use advanced techniques such as alternation, character classes, lookahead/behind, and proper escaping of special characters all in one regex pattern, making it a formidable challenge for even regex experts.", "timestamp": 1742326407702}, {"move": "complex\\.email\\+filter@example\\.co\\.uk|\\+44 20 7946 0958|2021\\/12\\/31|\\btemp007\\b", "player": "claude 3.7 sonnet (high2)", "reasoning": "My regex pattern uses alternation (|) to match exactly the four required items:\n1. For the email address: I escape the dots and plus sign as they're special regex characters\n2. For the phone number: I escape the plus sign at the beginning\n3. For the date: I escape the forward slashes\n4. For \"temp007\": I add word boundaries (\\b) to ensure it doesn't match when it appears inside \"agenttemp007\"\n\nThe pattern matches each target item exactly with appropriate escaping of special characters, and the word boundaries for \"temp007\" prevent it from matching when it appears as part of another word.", "timestamp": 1742326464600}, {"move": {"text": "Email validation:\nValid: alice.walker@personal-domain.co.uk, user.name+filter@gmail.com\nInvalid: alice@walker@domain.com, user..name@gmail.com, alice@personal-domain\n\nURLs to process: \nSecure endpoints: https://api.service.com/v2/users?apikey=12345, https://portal.example.org/login\nLegacy systems: http://old.example.com/profile, http://api.service.com/v2/users?apikey=12345\n\nImportant dates (DD.MM.YYYY format only):\nUpcoming: 15.12.2021, 01.02.2022\nDifferent format: 12/15/2021, 2021-12-15, 15/12/21\n\nProduct identifiers:\nActive: PRD-45672-XYZ, TST-98765-ABC\nDiscontinued: PRD-45672, prd-45672-xyz, PRD45672XYZ\n\nContact numbers:\nInternational: +1-888-555-1234, +44 20 7946 0958\nDomestic: (888) 555-1234, 888.555.1234, 888-555-1234\n\nIP addresses:\nCurrent network: 192.168.1.1, 2001:0db8:85a3:0000:0000:8a2e:0370:7334\nPrevious network: 10.0.0.1, 2001:0db8:85a3::8a2e:0370:7334\n\nTransaction log:\nApproved: $1,234.56 on 15.12.2021, €789.10 on 01.02.2022\nPending: $1234.56 on 12/15/2021, 1,234.56 USD on 2021-12-15\n\nHTML templates:\nForm elements: <input type=\"text\" value=\"test\" required />, <textarea name=\"comments\"></textarea>\nContent blocks: <div class=\"content\">Information</div>, <span id=\"highlight\">Important</span>", "targetItems": ["alice.walker@personal-domain.co.uk", "https://api.service.com/v2/users?apikey=12345", "15.12.2021", "PRD-45672-XYZ", "+1-888-555-1234", "2001:0db8:85a3:0000:0000:8a2e:0370:7334", "$1,234.56", "<input type=\"text\" value=\"test\" required />"]}, "player": "claude 3.7 sonnet (high2)", "reasoning": "For this challenge, I'm creating a scenario with multiple pattern types that each have subtle requirements and potential false positives. This will require advanced regex techniques including proper escaping, precise boundary handling, and distinguishing between very similar formats. Each target item has deliberately similar non-matching counterparts in the same text, requiring precision in pattern construction. The challenge includes complex email formats, URLs with specific path components and parameters, dates with particular formats, product codes with case sensitivity, international phone numbers with specific separators, a full IPv6 address, currency formatting with commas and decimals, and HTML with attributes and whitespace variations.", "timestamp": 1742326543324}, {"move": "alice\\.walker@personal-domain\\.co\\.uk|https://api\\.service\\.com/v2/users\\?apikey=12345|15\\.12\\.2021|PRD-45672-XYZ|\\+1-888-555-1234|2001:0db8:85a3:0000:0000:8a2e:0370:7334|\\$1,234\\.56|<input type=\"text\" value=\"test\" required />", "player": "o3-mini - (low)", "reasoning": "The goal is to create a regex that matches exactly the eight target strings (email, URL, date, product ID, international phone, IPv6, currency, and html snippet) and nothing more. I use an alternation pattern (using the | operator) to match each of these exactly. Special characters that might otherwise be interpreted as regex metacharacters (such as ., +, ?, and $) are escaped appropriately. The final regex will match exactly one of these items as they appear in the text, and nothing else.", "timestamp": 1742326554270}]