[{"move": {"text": "System Audit Log [2023-12-15]\n\nUSER MANAGEMENT:\n[VALID] User john.doe@example.com (ID: JD-2023-12-001) created account at 09:15:22\n[VALID] User jane_smith@company.co.uk (ID: JS-2023-12-002) modified profile at 10:23:45\n[VALID] User admin@internal.system (ID: ADMIN-2023-001) performed system backup at 11:30:15\n[INVALID] User john.smith@example.com (ID: JS-2023-12-003) attempted password reset at 12:05:30 - LOCKED\n[INVALID] User jane.doe@external.company (ID: JD-2023-12-X05) attempted login at 13:10:55 - INVALID ID\n\nEXPORT OPERATIONS:\n[VALID] Export ID: EXP-20231215-JD001 created by john.doe@example.com at 09:30:45\n[VALID] Export ID: EXP-20231215-JS002 created by jane_smith@company.co.uk at 10:40:15  \n[VALID] Export ID: EXP-20231215-AD001 created by admin@internal.system at 11:50:22\n[INVALID] Export ID: EXP20231215-JD002 attempted by john.doe@example.com at 09:35:10 - MISSING HYPHEN\n[INVALID] Export ID: EXP-20231215-XX001 attempted by unknown@example.com at 14:20:30 - INVALID PREFIX\n\nSYSTEM NOTES:\n- User ID format: Two letter prefix (or ADMIN), year, month, sequential number\n- Export ID format: EXP prefix, date, user identifier\n- Only entries marked [VALID] passed system validation checks\n- Reference ID JS-2023-12-002 linked to EXP-20231215-JS002 in transaction #45678\n- Reference ID JD-2023-12-001 linked to EXP-20231215-JD001 in transaction #45679\n- Reference ID ADMIN-2023-001 linked to EXP-20231215-AD001 in transaction #45680", "targetItems": ["JD-2023-12-001", "JS-2023-12-002", "ADMIN-2023-001", "EXP-20231215-JD001", "EXP-20231215-JS002", "EXP-20231215-AD001"]}, "player": "claude 3.7 sonnet (high2)", "reasoning": "I've created an extremely challenging regex problem that incorporates multiple pattern types requiring advanced techniques to match correctly. The text contains a system audit log with valid and invalid identifiers, where only specific valid formats should be matched. This challenge requires:\n\n1. Matching multiple different format types (user IDs and export IDs)\n2. Distinguishing between valid and invalid patterns with subtle differences\n3. Handling mixed formats with different prefixes, delimiters, and structures\n4. Avoiding near-matches and similar patterns that aren't valid\n5. Navigating contextual clues (only items marked [VALID] should be matched)\n\nThe regex solver will need to use techniques like positive/negative lookahead/lookbehind, alternation, precise quantifiers, and character classes to correctly identify only the valid patterns.", "timestamp": 1742325798813}, {"move": "(ADMIN|JD|JS)-\\d{4}-\\d{2}-\\d{3}|EXP-\\d{8}-(JD|JS|AD)\\d{3}", "player": "Llama 3.3 70B Instruct", "reasoning": "The pattern matches the specified targets by combining two parts: one for the user IDs and one for the export IDs. For user IDs, it matches either 'ADMIN' or a two-letter prefix, followed by the year, month, and a sequential number. For export IDs, it matches the 'EXP' prefix, the date, and the user identifier. The pattern uses alternation to match both types of IDs.", "timestamp": 1742325807228}]