[{"move": {"text": "Complex Log Start:\n\nAlert Emails: primary email - first.last+category@sub.domain.com, but beware of near-miss: first.last+category@sub.domain, and secondary email: user_name123@co-op.io, contrasted with similar pattern: user.name@co_op.io.\n\nPhone Numbers: Valid international numbers include +44 207 946 0128 and alternative format +1-800-555-0199, whereas numbers in formats like (555) 123-4567 or 800-555-0199 are not acceptable.\n\nDates: The date 2021-12-31 is in strict ISO format and must be matched; however 2021/12/31 or 31-12-2021 should be ignored.\n\nIDs: The valid ID AB12-XY_9 passes the criteria, while a close imitation A2B-XY_9 does not qualify.\n\nEnd of Complex Log.", "targetItems": ["first.last+category@sub.domain.com", "user_name123@co-op.io", "+44 207 946 0128", "+1-800-555-0199", "2021-12-31", "AB12-XY_9"]}, "player": "o3-mini - (low)", "reasoning": "I'm designing an extremely intricate challenge that combines multiple complex patterns into a single text sample. It includes advanced email formats (with plus addressing, subdomains, hyphenated domains), international phone numbers with different separators and optional parentheses (and false alternatives), strict ISO-like dates with hyphen separators, and custom IDs that must follow a specific pattern. The text also contains near misses and distractors to ensure naive regex solutions fail while requiring thorough knowledge of lookahead/lookbehind, complex alternation, and robust boundary definitions.", "timestamp": 1742324982305}, {"move": "first\\.last\\+category@sub\\.domain\\.com|user_name123@co-op\\.io|\\+44 207 946 0128|\\+1-800-555-0199|2021-12-31|AB12-XY_9", "player": "claude 3.7 sonnet", "reasoning": "My approach is to create a regex pattern that uses alternation (|) to match each of the exact target items. This ensures we only match the exact strings we want:\n\n1. For the emails:\n   - `first\\.last\\+category@sub\\.domain\\.com` - escaping special characters like dots and plus\n   - `user_name123@co-op\\.io` - note the hyphen in co-op needs no escaping in this context\n\n2. For the phone numbers:\n   - `\\+44 207 946 0128` - escaping the plus sign\n   - `\\+1-800-555-0199` - escaping the plus sign\n\n3. For the date:\n   - `2021-12-31` - simple pattern with literal numbers and hyphens\n\n4. For the ID:\n   - `AB12-XY_9` - matching the specific format with letters, numbers, hyphen and underscore\n\nBy using alternation with these exact patterns, we ensure we only match the target strings and nothing else. The | character separates each specific pattern to match.", "timestamp": 1742324992576}, {"move": {"text": "Network config:\nIPv6: 2001:0db8:85a3:0000:0000:8a2e:0370:7334 is primary\nBackup IPs include 2001:db8::1:0:0:1 and 2001:db8::8a2e:370:7334 (not ::1:2:3:4:5:6:7:8 or 2001:db8:85a3::)\n\nPayment methods:\nVisa: 4111 1111 1111 1111 (expires 05/28)\nMasterCard: 5500-0000-0000-0004 (active)\nAmex: 371449635398431 (new)\nDiscover: 6011-0009-9013-9424 (invalid)\n\nInventory:\n[SKU-A123-4X/9] Processor {$349.99}\n[CPU_B234-5Y/8] Memory Module {$129.50}\n[GPU-C345-6Z/7] Graphics Card {$599.99}\n[MB-D456-7W/6] Motherboard {$199.99}\n[PCI-E789/5] NOT IN STOCK\n[PWR_SUP-123] Power Supply\n\nFor support: regex_wizard@example.com or support+regex@company.co.uk (not admin@internal-only.net)", "targetItems": ["2001:0db8:85a3:0000:0000:8a2e:0370:7334", "2001:db8::1:0:0:1", "2001:db8::8a2e:370:7334", "4111 1111 1111 1111", "5500-0000-0000-0004", "371449635398431", "[SKU-A123-4X/9]", "[CPU_B234-5Y/8]", "[GPU-C345-6Z/7]", "[MB-D456-7W/6]", "regex_wizard@example.com", "support+regex@company.co.uk"]}, "player": "claude 3.7 sonnet", "reasoning": "I'm creating an extremely difficult challenge by combining several complex patterns that would require advanced regex techniques including lookaheads, lookbehinds, careful boundary matching, and proper handling of special characters. The challenge includes:\n1. Valid IPv6 addresses with different formats (compressed and uncompressed)\n2. Valid credit card numbers with different formats (spaces, dashes, or no separators)\n3. Valid Product IDs that follow specific patterns\n4. Similar but invalid patterns that should be excluded \n5. Special characters that require proper escaping\nThis will test the ability to create a precise regex that matches only the target items without false positives.", "timestamp": 1742325012659}, {"move": "2001:0db8:85a3:0000:0000:8a2e:0370:7334|2001:db8::1:0:0:1|2001:db8::8a2e:370:7334|4111 1111 1111 1111|5500-0000-0000-0004|371449635398431|\\[SKU-A123-4X/9\\]|\\[CPU_B234-5Y/8\\]|\\[GPU-C345-6Z/7\\]|\\[MB-D456-7W/6\\]|regex_wizard@example\\.com|support\\+regex@company\\.co\\.uk", "player": "o3-mini - (low)", "reasoning": "We want to exactly match the 12 target strings. The simplest approach is to build an alternation group that uses literal matching for each target string. Any characters that have special meanings in regex (such as '.', '+', '[', ']', '/') must be escaped as needed. For example, in email addresses, the dot in the domain must be escaped, and in support+regex@company.co.uk the + must be escaped. Similarly, the square brackets in the inventory items must be escaped. Therefore, the final pattern will list each target item separated by a pipe character.\n\nBelow is the resulting regex pattern (remember, this string does not include the leading and trailing slashes or any flags):\n\n2001:0db8:85a3:0000:0000:8a2e:0370:7334|\n2001:db8::1:0:0:1|\n2001:db8::8a2e:370:7334|\n4111 1111 1111 1111|\n5500-0000-0000-0004|\n371449635398431|\n\\[SKU-A123-4X/9\\]|\n\\[CPU_B234-5Y/8\\]|\n\\[GPU-C345-6Z/7\\]|\n\\[MB-D456-7W/6\\]|\nregex_wizard@example\\.com|\nsupport\\+regex@company\\.co\\.uk\n\nSince newlines are not allowed in the string, I will collapse it into one continuous line.", "timestamp": 1742325024439}, {"move": {"text": "Here are some tricky patterns you might encounter:\n\n1. Primary email: user+tag.name@example-domain.com, secondary email: user.tag.name@example_domain.com\n2. International contact: +1 (800) 555-0199 ext. 123, alternate: +1-800-555-0199\n3. Valid date: 2020-02-29, almost valid: 2021/02/29\n4. Special code: SN/2020-AB/XY, similar code: SN/2020-AB/XYZ\n5. Web resource: https://sub.domain-example.com/path?query=value#anchor, non-matching: http://sub.domain-example.com\n6. Quirky email padded with spaces:    complex_user_007@example.io   , and another: complex.user007@example.io\n\nYour task is to extract exactly these target items from the text (ignoring any distractors):\n   - user+tag.name@example-domain.com\n   - +1 (800) 555-0199 ext. 123\n   - 2020-02-29\n   - SN/2020-AB/XY\n   - https://sub.domain-example.com/path?query=value#anchor\n   -    complex_user_007@example.io   ", "targetItems": ["user+tag.name@example-domain.com", "+1 (800) 555-0199 ext. 123", "2020-02-29", "SN/2020-AB/XY", "https://sub.domain-example.com/path?query=value#anchor", "   complex_user_007@example.io   "]}, "player": "o3-mini - (low)", "reasoning": "I'm creating an extremely difficult challenge that includes multiple advanced regex elements in a single pattern. The text sample contains a mix of formats: complex emails with plus signs and hyphens, phone numbers with optional extension and parenthesis, ISO dates that require correct validation of leap years, structured codes with slashes and mixed separators, and URLs with query strings and anchors. Additionally, one of the target items includes extraneous whitespace that must be trimmed. The sample also includes some similar distractor items to increase difficulty. This challenge will require advanced regex techniques, including character-escaping, groups, lookahead/lookbehind constructs, optional matching, and alternating patterns.", "timestamp": 1742325036138}, {"move": "user\\+tag\\.name@example-domain\\.com|\\+1 \\(800\\) 555-0199 ext\\. 123|2020-02-29|SN\\/2020-AB\\/XY|https:\\/\\/sub\\.domain-example\\.com\\/path\\?query=value#anchor|   complex_user_007@example\\.io   ", "player": "claude 3.7 sonnet", "reasoning": "To create a regex that matches the 6 specific target items while avoiding distractors, I'll create patterns for each item and combine them with the OR operator (|):\n\n1. Email: `user\\+tag\\.name@example-domain\\.com` \n   - Escaping the plus and period characters which have special meaning in regex\n\n2. Phone number: `\\+1 \\(800\\) 555-0199 ext\\. 123`\n   - Escaping the plus, parentheses, and period characters\n\n3. Date: `2020-02-29`\n   - No special characters to escape\n\n4. Special code: `SN\\/2020-AB\\/XY`\n   - Escaping forward slashes\n\n5. URL: `https:\\/\\/sub\\.domain-example\\.com\\/path\\?query=value#anchor`\n   - Escaping forward slashes, period, and question mark\n\n6. Padded email: `   complex_user_007@example\\.io   `\n   - Including the exact spaces and escaping the period\n\nBy combining these patterns with the OR operator, the regex will match exactly these 6 items in the text and nothing else.", "timestamp": 1742325045945}]