{"abstract":"A pass, a move, then an opponent pass is treated as two consecutive passes.","category":"Go territory scoring","checks":8,"contract":"Input list of \"C:action\" tokens. Two consecutive passes by different players end the game [\"score\", None, index]; any board move clears a pending pass; \"resign\"/\"timeout\" end it with the opponent as winner [\"resign\"/\"time\", winner, index]. Otherwise [\"playing\", None, len(moves)].","evaluation_group":"w2-go-territory-scoring-game-end","failed_approach":"Clearing only when the passer moves again leaves the pass pending across an opponent move.","family":"w2-go-territory-scoring-game-end-pending-pass-reset","id":"FA-83226","implementations":{"attempt":{"sha256":"77b047769b6adf176bd173ab2586e2706c25f303120df9b6ab4e12ac4b1c7d02","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    moves = x\n    prev_pass = None\n    for idx, mv in enumerate(moves):\n        who, _, act = mv.partition(':')\n        other = 'W' if who == 'B' else 'B'\n        if act == 'resign':\n            return ['resign', other, idx]\n        if act == 'timeout':\n            return ['time', other, idx]\n        if act == 'pass':\n            if prev_pass is not None and prev_pass != who:\n                return ['score', None, idx]\n            prev_pass = who\n        else:\n            prev_pass = None if who == prev_pass else prev_pass\n    return ['playing', None, len(moves)]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[[[], ['playing', None, 0]], [['B:resign', 'W:pass', 'W:resign', 'B:resign', 'B:qq', 'W:cc'], ['resign', 'W', 0]], [['B:timeout', 'W:pass', 'B:cc', 'B:cc'], ['time', 'W', 0]], [['B:timeout', 'W:pass', 'W:pass', 'W:pass'], ['time', 'W', 0]], [['B:timeout', 'W:cc'], ['time', 'W', 0]], [['B:timeout', 'W:resign'], ['time', 'W', 0]], [['B:pass', 'W:cc', 'W:pass', 'B:cc'], ['playing', None, 4]], [['B:pass', 'W:cc', 'W:pass', 'B:cc'], ['playing', None, 4]]], [[['B:pass', 'W:dd'], ['playing', None, 2]], [['W:cc', 'B:pass', 'B:dd', 'W:cc', 'B:resign'], ['resign', 'W', 4]], [['B:pass'], ['playing', None, 1]], [['B:resign'], ['resign', 'W', 0]], [['B:resign', 'B:cc', 'W:timeout', 'W:pass', 'B:cc'], ['resign', 'W', 0]], [['B:cc', 'W:pass', 'B:dd', 'B:resign'], ['resign', 'W', 3]], [['B:pass', 'W:dd', 'B:cc', 'W:pass'], ['playing', None, 4]], [['B:pass', 'W:cc', 'W:pass', 'W:timeout', 'B:qq'], ['time', 'B', 3]]], [[['B:pass', 'W:qq'], ['playing', None, 2]], [['B:resign', 'W:pass'], ['resign', 'W', 0]], [['B:pass', 'W:cc', 'W:pass', 'B:cc'], ['playing', None, 4]], [['B:pass', 'W:qq'], ['playing', None, 2]], [['B:pass', 'B:dd', 'B:qq'], ['playing', None, 3]], [['W:pass'], ['playing', None, 1]], [['B:qq', 'W:cc', 'B:pass', 'B:cc'], ['playing', None, 4]], [['B:pass', 'B:dd', 'W:pass'], ['playing', None, 3]]], [[['B:resign', 'W:pass', 'B:pass', 'W:dd'], ['resign', 'W', 0]], [['B:pass', 'W:qq', 'B:resign', 'W:pass', 'B:resign'], ['resign', 'W', 2]], [['B:dd', 'W:pass', 'B:pass', 'W:cc', 'B:cc'], ['score', None, 2]], [['B:dd', 'W:resign', 'B:dd', 'W:dd'], ['resign', 'B', 1]], [['W:qq', 'W:timeout', 'B:dd', 'W:pass', 'B:cc', 'W:qq'], ['time', 'B', 1]], [['B:dd'], ['playing', None, 1]], [['B:pass', 'B:cc', 'B:cc', 'W:pass', 'W:cc', 'W:pass'], ['playing', None, 6]], [['B:pass', 'W:cc', 'W:pass', 'W:timeout', 'B:qq'], ['time', 'B', 3]]], [[['B:pass', 'W:cc', 'W:pass', 'B:cc'], ['playing', None, 4]], [['B:dd', 'B:cc', 'B:cc', 'W:resign'], ['resign', 'B', 3]], [['W:pass', 'B:timeout', 'B:cc', 'W:dd'], ['time', 'W', 1]], [['B:timeout'], ['time', 'W', 0]], [['B:pass', 'W:pass', 'B:pass', 'W:resign', 'B:pass', 'W:dd'], ['score', None, 1]], [['W:timeout', 'W:cc', 'B:cc', 'W:pass', 'B:dd', 'W:qq'], ['time', 'B', 0]], [['B:pass', 'W:resign', 'W:pass'], ['resign', 'B', 1]], [['W:pass', 'W:qq', 'B:dd', 'W:cc', 'B:pass', 'B:dd'], ['playing', None, 6]]]]\nfor i, (args, expected) in enumerate(fixtures[N-1]):\n    check(\"game end case %d\" % i, solve(args), expected)\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":"2820741ed566aad0f0c2caa122aceade49446b6c5b56d3b49dd719350ac00544","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    moves = x\n    prev_pass = None\n    for idx, mv in enumerate(moves):\n        who, _, act = mv.partition(':')\n        other = 'W' if who == 'B' else 'B'\n        if act == 'resign':\n            return ['resign', other, idx]\n        if act == 'timeout':\n            return ['time', other, idx]\n        if act == 'pass':\n            if prev_pass is not None and prev_pass != who:\n                return ['score', None, idx]\n            prev_pass = who\n    return ['playing', None, len(moves)]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[[[], ['playing', None, 0]], [['B:resign', 'W:pass', 'W:resign', 'B:resign', 'B:qq', 'W:cc'], ['resign', 'W', 0]], [['B:timeout', 'W:pass', 'B:cc', 'B:cc'], ['time', 'W', 0]], [['B:timeout', 'W:pass', 'W:pass', 'W:pass'], ['time', 'W', 0]], [['B:timeout', 'W:cc'], ['time', 'W', 0]], [['B:timeout', 'W:resign'], ['time', 'W', 0]], [['B:pass', 'W:cc', 'W:pass', 'B:cc'], ['playing', None, 4]], [['B:pass', 'W:cc', 'W:pass', 'B:cc'], ['playing', None, 4]]], [[['B:pass', 'W:dd'], ['playing', None, 2]], [['W:cc', 'B:pass', 'B:dd', 'W:cc', 'B:resign'], ['resign', 'W', 4]], [['B:pass'], ['playing', None, 1]], [['B:resign'], ['resign', 'W', 0]], [['B:resign', 'B:cc', 'W:timeout', 'W:pass', 'B:cc'], ['resign', 'W', 0]], [['B:cc', 'W:pass', 'B:dd', 'B:resign'], ['resign', 'W', 3]], [['B:pass', 'W:dd', 'B:cc', 'W:pass'], ['playing', None, 4]], [['B:pass', 'W:cc', 'W:pass', 'W:timeout', 'B:qq'], ['time', 'B', 3]]], [[['B:pass', 'W:qq'], ['playing', None, 2]], [['B:resign', 'W:pass'], ['resign', 'W', 0]], [['B:pass', 'W:cc', 'W:pass', 'B:cc'], ['playing', None, 4]], [['B:pass', 'W:qq'], ['playing', None, 2]], [['B:pass', 'B:dd', 'B:qq'], ['playing', None, 3]], [['W:pass'], ['playing', None, 1]], [['B:qq', 'W:cc', 'B:pass', 'B:cc'], ['playing', None, 4]], [['B:pass', 'B:dd', 'W:pass'], ['playing', None, 3]]], [[['B:resign', 'W:pass', 'B:pass', 'W:dd'], ['resign', 'W', 0]], [['B:pass', 'W:qq', 'B:resign', 'W:pass', 'B:resign'], ['resign', 'W', 2]], [['B:dd', 'W:pass', 'B:pass', 'W:cc', 'B:cc'], ['score', None, 2]], [['B:dd', 'W:resign', 'B:dd', 'W:dd'], ['resign', 'B', 1]], [['W:qq', 'W:timeout', 'B:dd', 'W:pass', 'B:cc', 'W:qq'], ['time', 'B', 1]], [['B:dd'], ['playing', None, 1]], [['B:pass', 'B:cc', 'B:cc', 'W:pass', 'W:cc', 'W:pass'], ['playing', None, 6]], [['B:pass', 'W:cc', 'W:pass', 'W:timeout', 'B:qq'], ['time', 'B', 3]]], [[['B:pass', 'W:cc', 'W:pass', 'B:cc'], ['playing', None, 4]], [['B:dd', 'B:cc', 'B:cc', 'W:resign'], ['resign', 'B', 3]], [['W:pass', 'B:timeout', 'B:cc', 'W:dd'], ['time', 'W', 1]], [['B:timeout'], ['time', 'W', 0]], [['B:pass', 'W:pass', 'B:pass', 'W:resign', 'B:pass', 'W:dd'], ['score', None, 1]], [['W:timeout', 'W:cc', 'B:cc', 'W:pass', 'B:dd', 'W:qq'], ['time', 'B', 0]], [['B:pass', 'W:resign', 'W:pass'], ['resign', 'B', 1]], [['W:pass', 'W:qq', 'B:dd', 'W:cc', 'B:pass', 'B:dd'], ['playing', None, 6]]]]\nfor i, (args, expected) in enumerate(fixtures[N-1]):\n    check(\"game end case %d\" % i, solve(args), expected)\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":"0e484a3fed46a42ba5bc351b36dd96c7e782b4cc24e3ae8011902d32b9fa4527","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    moves = x\n    prev_pass = None\n    for idx, mv in enumerate(moves):\n        who, _, act = mv.partition(':')\n        other = 'W' if who == 'B' else 'B'\n        if act == 'resign':\n            return ['resign', other, idx]\n        if act == 'timeout':\n            return ['time', other, idx]\n        if act == 'pass':\n            if prev_pass is not None and prev_pass != who:\n                return ['score', None, idx]\n            prev_pass = who\n        else:\n            prev_pass = None\n    return ['playing', None, len(moves)]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[[[], ['playing', None, 0]], [['B:resign', 'W:pass', 'W:resign', 'B:resign', 'B:qq', 'W:cc'], ['resign', 'W', 0]], [['B:timeout', 'W:pass', 'B:cc', 'B:cc'], ['time', 'W', 0]], [['B:timeout', 'W:pass', 'W:pass', 'W:pass'], ['time', 'W', 0]], [['B:timeout', 'W:cc'], ['time', 'W', 0]], [['B:timeout', 'W:resign'], ['time', 'W', 0]], [['B:pass', 'W:cc', 'W:pass', 'B:cc'], ['playing', None, 4]], [['B:pass', 'W:cc', 'W:pass', 'B:cc'], ['playing', None, 4]]], [[['B:pass', 'W:dd'], ['playing', None, 2]], [['W:cc', 'B:pass', 'B:dd', 'W:cc', 'B:resign'], ['resign', 'W', 4]], [['B:pass'], ['playing', None, 1]], [['B:resign'], ['resign', 'W', 0]], [['B:resign', 'B:cc', 'W:timeout', 'W:pass', 'B:cc'], ['resign', 'W', 0]], [['B:cc', 'W:pass', 'B:dd', 'B:resign'], ['resign', 'W', 3]], [['B:pass', 'W:dd', 'B:cc', 'W:pass'], ['playing', None, 4]], [['B:pass', 'W:cc', 'W:pass', 'W:timeout', 'B:qq'], ['time', 'B', 3]]], [[['B:pass', 'W:qq'], ['playing', None, 2]], [['B:resign', 'W:pass'], ['resign', 'W', 0]], [['B:pass', 'W:cc', 'W:pass', 'B:cc'], ['playing', None, 4]], [['B:pass', 'W:qq'], ['playing', None, 2]], [['B:pass', 'B:dd', 'B:qq'], ['playing', None, 3]], [['W:pass'], ['playing', None, 1]], [['B:qq', 'W:cc', 'B:pass', 'B:cc'], ['playing', None, 4]], [['B:pass', 'B:dd', 'W:pass'], ['playing', None, 3]]], [[['B:resign', 'W:pass', 'B:pass', 'W:dd'], ['resign', 'W', 0]], [['B:pass', 'W:qq', 'B:resign', 'W:pass', 'B:resign'], ['resign', 'W', 2]], [['B:dd', 'W:pass', 'B:pass', 'W:cc', 'B:cc'], ['score', None, 2]], [['B:dd', 'W:resign', 'B:dd', 'W:dd'], ['resign', 'B', 1]], [['W:qq', 'W:timeout', 'B:dd', 'W:pass', 'B:cc', 'W:qq'], ['time', 'B', 1]], [['B:dd'], ['playing', None, 1]], [['B:pass', 'B:cc', 'B:cc', 'W:pass', 'W:cc', 'W:pass'], ['playing', None, 6]], [['B:pass', 'W:cc', 'W:pass', 'W:timeout', 'B:qq'], ['time', 'B', 3]]], [[['B:pass', 'W:cc', 'W:pass', 'B:cc'], ['playing', None, 4]], [['B:dd', 'B:cc', 'B:cc', 'W:resign'], ['resign', 'B', 3]], [['W:pass', 'B:timeout', 'B:cc', 'W:dd'], ['time', 'W', 1]], [['B:timeout'], ['time', 'W', 0]], [['B:pass', 'W:pass', 'B:pass', 'W:resign', 'B:pass', 'W:dd'], ['score', None, 1]], [['W:timeout', 'W:cc', 'B:cc', 'W:pass', 'B:dd', 'W:qq'], ['time', 'B', 0]], [['B:pass', 'W:resign', 'W:pass'], ['resign', 'B', 1]], [['W:pass', 'W:qq', 'B:dd', 'W:cc', 'B:pass', 'B:dd'], ['playing', None, 6]]]]\nfor i, (args, expected) in enumerate(fixtures[N-1]):\n    check(\"game end case %d\" % i, solve(args), expected)\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":"Small rectangular toy boards given as strings of B, W and dot; a bounded teaching model of one scoring or bookkeeping rule, not a complete rules engine or server implementation. 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":"w2-go-territory-scoring-game-end-pending-pass-reset","generated_at":"2026-09-29T14:50:19.538976+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Go servers and scoring tools compute this value automatically; a wrong answer changes a game result.","repair":"Clear the pending pass after any board move.","root_cause":"Board moves do not clear the pending pass.","sha256":"99c3b20a29816fcd393493a1556d870304d40e72ce2dab2903195ad329a43bec","title":"Non-consecutive passes end the game · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":38.956,"exit_code":1,"observations":[{"actual":["playing",null,0],"check":"game end case 0","expected":["playing",null,0],"passed":true},{"actual":["resign","W",0],"check":"game end case 1","expected":["resign","W",0],"passed":true},{"actual":["time","W",0],"check":"game end case 2","expected":["time","W",0],"passed":true},{"actual":["time","W",0],"check":"game end case 3","expected":["time","W",0],"passed":true},{"actual":["time","W",0],"check":"game end case 4","expected":["time","W",0],"passed":true},{"actual":["time","W",0],"check":"game end case 5","expected":["time","W",0],"passed":true},{"actual":["score",null,2],"check":"game end case 6","expected":["playing",null,4],"passed":false},{"actual":["score",null,2],"check":"game end case 7","expected":["playing",null,4],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"game end case 0\", \"actual\": [\"playing\", null, 0], \"expected\": [\"playing\", null, 0], \"passed\": true}, {\"check\": \"game end case 1\", \"actual\": [\"resign\", \"W\", 0], \"expected\": [\"resign\", \"W\", 0], \"passed\": true}, {\"check\": \"game end case 2\", \"actual\": [\"time\", \"W\", 0], \"expected\": [\"time\", \"W\", 0], \"passed\": true}, {\"check\": \"game end case 3\", \"actual\": [\"time\", \"W\", 0], \"expected\": [\"time\", \"W\", 0], \"passed\": true}, {\"check\": \"game end case 4\", \"actual\": [\"time\", \"W\", 0], \"expected\": [\"time\", \"W\", 0], \"passed\": true}, {\"check\": \"game end case 5\", \"actual\": [\"time\", \"W\", 0], \"expected\": [\"time\", \"W\", 0], \"passed\": true}, {\"check\": \"game end case 6\", \"actual\": [\"score\", null, 2], \"expected\": [\"playing\", null, 4], \"passed\": false}, {\"check\": \"game end case 7\", \"actual\": [\"score\", null, 2], \"expected\": [\"playing\", null, 4], \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":40.902,"exit_code":1,"observations":[{"actual":["playing",null,0],"check":"game end case 0","expected":["playing",null,0],"passed":true},{"actual":["resign","W",0],"check":"game end case 1","expected":["resign","W",0],"passed":true},{"actual":["time","W",0],"check":"game end case 2","expected":["time","W",0],"passed":true},{"actual":["time","W",0],"check":"game end case 3","expected":["time","W",0],"passed":true},{"actual":["time","W",0],"check":"game end case 4","expected":["time","W",0],"passed":true},{"actual":["time","W",0],"check":"game end case 5","expected":["time","W",0],"passed":true},{"actual":["score",null,2],"check":"game end case 6","expected":["playing",null,4],"passed":false},{"actual":["score",null,2],"check":"game end case 7","expected":["playing",null,4],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"game end case 0\", \"actual\": [\"playing\", null, 0], \"expected\": [\"playing\", null, 0], \"passed\": true}, {\"check\": \"game end case 1\", \"actual\": [\"resign\", \"W\", 0], \"expected\": [\"resign\", \"W\", 0], \"passed\": true}, {\"check\": \"game end case 2\", \"actual\": [\"time\", \"W\", 0], \"expected\": [\"time\", \"W\", 0], \"passed\": true}, {\"check\": \"game end case 3\", \"actual\": [\"time\", \"W\", 0], \"expected\": [\"time\", \"W\", 0], \"passed\": true}, {\"check\": \"game end case 4\", \"actual\": [\"time\", \"W\", 0], \"expected\": [\"time\", \"W\", 0], \"passed\": true}, {\"check\": \"game end case 5\", \"actual\": [\"time\", \"W\", 0], \"expected\": [\"time\", \"W\", 0], \"passed\": true}, {\"check\": \"game end case 6\", \"actual\": [\"score\", null, 2], \"expected\": [\"playing\", null, 4], \"passed\": false}, {\"check\": \"game end case 7\", \"actual\": [\"score\", null, 2], \"expected\": [\"playing\", null, 4], \"passed\": false}], \"passed\": false}\n"},"fixed":{"elapsed_ms":39.027,"exit_code":0,"observations":[{"actual":["playing",null,0],"check":"game end case 0","expected":["playing",null,0],"passed":true},{"actual":["resign","W",0],"check":"game end case 1","expected":["resign","W",0],"passed":true},{"actual":["time","W",0],"check":"game end case 2","expected":["time","W",0],"passed":true},{"actual":["time","W",0],"check":"game end case 3","expected":["time","W",0],"passed":true},{"actual":["time","W",0],"check":"game end case 4","expected":["time","W",0],"passed":true},{"actual":["time","W",0],"check":"game end case 5","expected":["time","W",0],"passed":true},{"actual":["playing",null,4],"check":"game end case 6","expected":["playing",null,4],"passed":true},{"actual":["playing",null,4],"check":"game end case 7","expected":["playing",null,4],"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"game end case 0\", \"actual\": [\"playing\", null, 0], \"expected\": [\"playing\", null, 0], \"passed\": true}, {\"check\": \"game end case 1\", \"actual\": [\"resign\", \"W\", 0], \"expected\": [\"resign\", \"W\", 0], \"passed\": true}, {\"check\": \"game end case 2\", \"actual\": [\"time\", \"W\", 0], \"expected\": [\"time\", \"W\", 0], \"passed\": true}, {\"check\": \"game end case 3\", \"actual\": [\"time\", \"W\", 0], \"expected\": [\"time\", \"W\", 0], \"passed\": true}, {\"check\": \"game end case 4\", \"actual\": [\"time\", \"W\", 0], \"expected\": [\"time\", \"W\", 0], \"passed\": true}, {\"check\": \"game end case 5\", \"actual\": [\"time\", \"W\", 0], \"expected\": [\"time\", \"W\", 0], \"passed\": true}, {\"check\": \"game end case 6\", \"actual\": [\"playing\", null, 4], \"expected\": [\"playing\", null, 4], \"passed\": true}, {\"check\": \"game end case 7\", \"actual\": [\"playing\", null, 4], \"expected\": [\"playing\", null, 4], \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}