{"abstract":"Withdrawn opponents disappear from historical tiebreaks.","category":"Tournament pairing rules","checks":6,"contract":"Synthetic model: Each encounter contributes its opponent final signed score, regardless of the current active flag in (score,active) records.","evaluation_group":"tournament-encounter-score-contribution","failed_approach":"Reintroducing withdrawn players with a zero floor loses signed penalty adjustments.","family":"z-tournament_pairing-withdrawal-history","id":"FA-12826","implementations":{"attempt":{"sha256":"a1e6320aac0fef3d96802df108327489634ceb547ed0649134635902ea9ebee3","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(encounters, records):\n    return sum(max(0,records[p][0]) for p in encounters)\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('withdrawn', solve(['a'], {'a':(N,False)}), N)\ncheck('penalty', solve(['a'], {'a':(-N,False)}), -N)\ncheck('active', solve(['a'], {'a':(N,True)}), N)\ncheck('mixed', solve(['a','b'], {'a':(N,False),'b':(2,True)}), N+2)\ncheck('empty', solve([], {}), 0)\ncheck('zero withdrawn', solve(['a'], {'a':(0,False)}), 0)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"broken":{"sha256":"658516157ba9a5f13fb04740f02f7f1ddeb11c7aff29f17cbcdd2261210bcbe7","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(encounters, records):\n    return sum(records[p][0] for p in encounters if records[p][1])\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('withdrawn', solve(['a'], {'a':(N,False)}), N)\ncheck('penalty', solve(['a'], {'a':(-N,False)}), -N)\ncheck('active', solve(['a'], {'a':(N,True)}), N)\ncheck('mixed', solve(['a','b'], {'a':(N,False),'b':(2,True)}), N+2)\ncheck('empty', solve([], {}), 0)\ncheck('zero withdrawn', solve(['a'], {'a':(0,False)}), 0)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"fixed":{"sha256":"7eef2f1982b1718d6d993d2a69e60c2c766c6f5908348a24fbc4eab2764c84c7","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(encounters, records):\n    return sum(records[p][0] for p in encounters)\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('withdrawn', solve(['a'], {'a':(N,False)}), N)\ncheck('penalty', solve(['a'], {'a':(-N,False)}), -N)\ncheck('active', solve(['a'], {'a':(N,True)}), N)\ncheck('mixed', solve(['a','b'], {'a':(N,False),'b':(2,True)}), N+2)\ncheck('empty', solve([], {}), 0)\ncheck('zero withdrawn', solve(['a'], {'a':(0,False)}), 0)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"}},"limitations":"Controlled synthetic policy; does not implement an entire tournament system. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.","method":"Deterministic executable model with adversarial boundary fixtures.","provenance":{"created_by":"Failure Map","dependencies":"Python standard library","family":"z-tournament_pairing-withdrawal-history","generated_at":"2026-09-29T14:39:00.567534+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Makes the stated pairing or standings policy executable without assuming any real federation rulebook.","repair":"Each encounter contributes its opponent final signed score, regardless of the current active flag in (score,active) records.","root_cause":"Current active status filters already completed encounters.","sha256":"4b854d9bbef1fe272d435c82f3c53df64d476b0d04c39aed9f6ebc4c90cdbc63","title":"Withdrawn opponents disappear from historical tiebreaks · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":42.716,"exit_code":1,"observations":[{"actual":1,"check":"withdrawn","expected":1,"passed":true},{"actual":0,"check":"penalty","expected":-1,"passed":false},{"actual":1,"check":"active","expected":1,"passed":true},{"actual":3,"check":"mixed","expected":3,"passed":true},{"actual":0,"check":"empty","expected":0,"passed":true},{"actual":0,"check":"zero withdrawn","expected":0,"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"withdrawn\", \"actual\": 1, \"expected\": 1, \"passed\": true}, {\"check\": \"penalty\", \"actual\": 0, \"expected\": -1, \"passed\": false}, {\"check\": \"active\", \"actual\": 1, \"expected\": 1, \"passed\": true}, {\"check\": \"mixed\", \"actual\": 3, \"expected\": 3, \"passed\": true}, {\"check\": \"empty\", \"actual\": 0, \"expected\": 0, \"passed\": true}, {\"check\": \"zero withdrawn\", \"actual\": 0, \"expected\": 0, \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":40.92,"exit_code":1,"observations":[{"actual":0,"check":"withdrawn","expected":1,"passed":false},{"actual":0,"check":"penalty","expected":-1,"passed":false},{"actual":1,"check":"active","expected":1,"passed":true},{"actual":2,"check":"mixed","expected":3,"passed":false},{"actual":0,"check":"empty","expected":0,"passed":true},{"actual":0,"check":"zero withdrawn","expected":0,"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"withdrawn\", \"actual\": 0, \"expected\": 1, \"passed\": false}, {\"check\": \"penalty\", \"actual\": 0, \"expected\": -1, \"passed\": false}, {\"check\": \"active\", \"actual\": 1, \"expected\": 1, \"passed\": true}, {\"check\": \"mixed\", \"actual\": 2, \"expected\": 3, \"passed\": false}, {\"check\": \"empty\", \"actual\": 0, \"expected\": 0, \"passed\": true}, {\"check\": \"zero withdrawn\", \"actual\": 0, \"expected\": 0, \"passed\": true}], \"passed\": false}\n"},"fixed":{"elapsed_ms":43.964,"exit_code":0,"observations":[{"actual":1,"check":"withdrawn","expected":1,"passed":true},{"actual":-1,"check":"penalty","expected":-1,"passed":true},{"actual":1,"check":"active","expected":1,"passed":true},{"actual":3,"check":"mixed","expected":3,"passed":true},{"actual":0,"check":"empty","expected":0,"passed":true},{"actual":0,"check":"zero withdrawn","expected":0,"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"withdrawn\", \"actual\": 1, \"expected\": 1, \"passed\": true}, {\"check\": \"penalty\", \"actual\": -1, \"expected\": -1, \"passed\": true}, {\"check\": \"active\", \"actual\": 1, \"expected\": 1, \"passed\": true}, {\"check\": \"mixed\", \"actual\": 3, \"expected\": 3, \"passed\": true}, {\"check\": \"empty\", \"actual\": 0, \"expected\": 0, \"passed\": true}, {\"check\": \"zero withdrawn\", \"actual\": 0, \"expected\": 0, \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}