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FA-84001 / Sports scoring and tiebreakers / Open access

Strike not rotated at the end of an over · case 01

The same batter is shown on strike for the first ball of the new over.

Verified by executionVariant 1 · 10 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

The end-of-over swap is missing.

VERIFIED REPAIR

Swap strike after each sixth legal ball.

Unsuccessful approach: Swapping whenever the legal count is a multiple of six also swaps on wides and no-balls bowled then.

Case contract

Ball-by-ball innings tally. Events: "0".."6" runs off the bat (legal ball); "W" wicket (legal ball, no runs, the new batter takes strike); "wdK" wide: 1 penalty + K run wides, all extras, not a legal ball, K runs completed; "nbK" no-ball: 1 penalty extra + K runs off the bat, not a legal ball; "bK"/"lbK" byes/leg byes: K extras on a legal ball. Batters change ends when an odd number of runs is completed, and again after the 6th legal ball of an over. Batters are numbered 1, 2 and then 3, 4, ... as they come in; batter 1 starts on strike. Return [total, wickets, overs "O.B", extras, batter on strike].

Why this case matters

Scoring apps derive totals, overs and strike from ball events; extras and strike rotation are error-prone.

1 / The failure

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(events):
    total = wickets = legal = extras = 0
    striker, non = 1, 2
    next_bat = 3
    for e in events:
        if e == 'W':
            wickets += 1
            legal += 1
            striker = next_bat
            next_bat += 1
            ran = 0
        elif e.startswith('wd'):
            k = int(e[2:] or 0)
            total += 1 + k
            extras += 1 + k
            ran = k
        elif e.startswith('nb'):
            k = int(e[2:] or 0)
            total += 1 + k
            extras += 1
            ran = k
        elif e[0] in 'bl':
            k = int(e.lstrip('lb'))
            total += k
            extras += k
            legal += 1
            ran = k
        else:
            k = int(e)
            total += k
            legal += 1
            ran = k
        if ran % 2 == 1:
            striker, non = non, striker
    return [total, wickets, '%d.%d' % (legal // 6, legal % 6), extras, striker]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
def run(args):
    try:
        return solve(*args)
    except Exception as exc:
        return 'raised ' + type(exc).__name__
cases = [[('control maiden over', (['0', '0', '0', '0', '0', '0'],), [0, 0, '1.0', 0, 2]),
  ('boundary single rotates strike', (['1'],), [1, 0, '0.1', 0, 2]),
  ('boundary wide is not a legal ball', (['wd', '4'],), [5, 0, '0.1', 1, 1]),
  ('control no-ball boundary', (['nb4'],), [5, 0, '0.0', 1, 1]),
  ('boundary wicket brings new striker', (['W', '0'],), [0, 1, '0.2', 0, 3]),
  ('control leg byes', (['lb1', '2'],), [3, 0, '0.2', 1, 2]),
  ('regression: over end rotation', (['nb', '2', '0', '4'],), [7, 0, '0.3', 1, 1]),
  ('regression: over end rotation', (['wd', '0', '1', '4', '0', '1', '0'],), [7, 0, '1.0', 1, 2]),
  ('variant scenario 1', (['b1', '4', '1'],), [6, 0, '0.3', 1, 1]),
  ('variant scenario 2',
   (['1', '4', '4', '0', '0', '2', '4', 'b1', '0', 'wd1'],),
   [18, 0, '1.3', 3, 1])],
 [('control maiden over', (['0', '0', '0', '0', '0', '0'],), [0, 0, '1.0', 0, 2]),
  ('boundary single rotates strike', (['1'],), [1, 0, '0.1', 0, 2]),
  ('boundary wide is not a legal ball', (['wd', '4'],), [5, 0, '0.1', 1, 1]),
  ('control no-ball boundary', (['nb4'],), [5, 0, '0.0', 1, 1]),
  ('boundary wicket brings new striker', (['W', '0'],), [0, 1, '0.2', 0, 3]),
  ('control leg byes', (['lb1', '2'],), [3, 0, '0.2', 1, 2]),
  ('regression: over end rotation',
   (['nb4', '1', '0', 'nb1', '1', 'W', '0', '0', 'wd4', '1', 'b4', '1'],),
   [20, 1, '1.3', 11, 1]),
  ('variant scenario 1',
   (['1', '3', '4', 'nb1', 'wd', '4', '0', '4', '1', '1', 'wd1', '1', 'nb', 'lb2'],),
   [27, 0, '1.4', 7, 1]),
  ('variant scenario 2', (['6', 'lb2', '1'],), [9, 0, '0.3', 2, 2])],
 [('control maiden over', (['0', '0', '0', '0', '0', '0'],), [0, 0, '1.0', 0, 2]),
  ('boundary single rotates strike', (['1'],), [1, 0, '0.1', 0, 2]),
  ('boundary wide is not a legal ball', (['wd', '4'],), [5, 0, '0.1', 1, 1]),
  ('control no-ball boundary', (['nb4'],), [5, 0, '0.0', 1, 1]),
  ('boundary wicket brings new striker', (['W', '0'],), [0, 1, '0.2', 0, 3]),
  ('control leg byes', (['lb1', '2'],), [3, 0, '0.2', 1, 2]),
  ('regression: over end rotation',
   (['0', 'b1', 'b1', '0', '1', '1', 'b4', '0', 'nb4', '0'],),
   [13, 0, '1.3', 7, 2]),
  ('regression: over end rotation',
   (['wd1',
     '2',
     'b1',
     'wd1',
     'nb',
     '4',
     '1',
     'wd',
     '1',
     '0',
     'wd1',
     'wd',
     '2',
     '0',
     'nb4',
     '1',
     '1',
     'wd',
     'wd1',
     '6'],),
   [36, 0, '1.5', 14, 1]),
  ('variant scenario 1',
   (['1', '2', 'nb1', '3', '1', 'nb', '0', 'W', '4', '0', '1', '0', 'b1', 'nb', '1', '3', 'lb1'],),
   [22, 1, '2.2', 5, 2]),
  ('variant scenario 2',
   (['1', '0', '1', '1', '2', 'b1', '4', '1', 'nb', '2', '4', '4', '6', 'lb2', 'wd4', 'W'],),
   [35, 1, '2.2', 9, 3])],
 [('control maiden over', (['0', '0', '0', '0', '0', '0'],), [0, 0, '1.0', 0, 2]),
  ('boundary single rotates strike', (['1'],), [1, 0, '0.1', 0, 2]),
  ('boundary wide is not a legal ball', (['wd', '4'],), [5, 0, '0.1', 1, 1]),
  ('control no-ball boundary', (['nb4'],), [5, 0, '0.0', 1, 1]),
  ('boundary wicket brings new striker', (['W', '0'],), [0, 1, '0.2', 0, 3]),
  ('control leg byes', (['lb1', '2'],), [3, 0, '0.2', 1, 2]),
  ('regression: over end rotation',
   (['4',
     'nb',
     '4',
     '3',
     'b4',
     '1',
     '1',
     'W',
     'nb4',
     '6',
     '1',
     '0',
     'b4',
     'nb4',
     '2',
     '1',
     '0',
     'W',
     '2',
     '0',
     'lb1',
     '1'],),
   [46, 2, '3.1', 12, 3]),
  ('regression: over end rotation',
   (['wd',
     '1',
     'nb4',
     'wd1',
     '1',
     'wd',
     '2',
     '1',
     'nb4',
     '1',
     '1',
     '4',
     'wd4',
     '4',
     '6',
     '0',
     'wd1',
     '6'],),
   [48, 0, '1.5', 13, 1]),
  ('variant scenario 1',
   (['W', 'wd1', '3', 'wd4', '4', 'b1', '3', 'wd', 'b1'],),
   [20, 1, '1.0', 10, 3]),
  ('variant scenario 2',
   (['0',
     '6',
     'b1',
     'wd1',
     'lb2',
     'lb1',
     'lb1',
     'nb1',
     '0',
     'W',
     '4',
     'lb1',
     '0',
     '1',
     'nb4',
     '1',
     '0'],),
   [27, 1, '2.2', 10, 3])],
 [('control maiden over', (['0', '0', '0', '0', '0', '0'],), [0, 0, '1.0', 0, 2]),
  ('boundary single rotates strike', (['1'],), [1, 0, '0.1', 0, 2]),
  ('boundary wide is not a legal ball', (['wd', '4'],), [5, 0, '0.1', 1, 1]),
  ('control no-ball boundary', (['nb4'],), [5, 0, '0.0', 1, 1]),
  ('boundary wicket brings new striker', (['W', '0'],), [0, 1, '0.2', 0, 3]),
  ('control leg byes', (['lb1', '2'],), [3, 0, '0.2', 1, 2]),
  ('regression: over end rotation',
   (['lb2',
     '4',
     '2',
     '4',
     '2',
     'b4',
     'wd',
     '1',
     'wd4',
     '4',
     'nb1',
     '6',
     '6',
     'nb',
     '1',
     'nb4',
     '0',
     '1',
     '4',
     '1',
     'nb1',
     '2',
     'nb'],),
   [61, 0, '2.4', 17, 1]),
  ('regression: over end rotation',
   (['4', '4', 'W', '2', 'nb4', '0', 'nb4', '6'],),
   [26, 1, '1.0', 2, 2]),
  ('variant scenario 1',
   (['lb1',
     'wd4',
     '0',
     '6',
     'W',
     '1',
     '2',
     'b1',
     '0',
     '1',
     'wd4',
     '0',
     '1',
     '0',
     '1',
     'wd',
     '1',
     '3',
     '6',
     '2',
     '0',
     'W',
     'wd',
     'b4'],),
   [42, 2, '3.2', 18, 4]),
  ('variant scenario 2', (['0', '1', '4', 'wd', '1', 'b1'],), [8, 0, '0.5', 2, 2])]]
for label, args, expected in cases[N - 1]:
    check(label, run(args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
control maiden over[0, 0, '1.0', 0, 1][0, 0, '1.0', 0, 2]Failed
boundary single rotates strike[1, 0, '0.1', 0, 2][1, 0, '0.1', 0, 2]Passed
boundary wide is not a legal ball[5, 0, '0.1', 1, 1][5, 0, '0.1', 1, 1]Passed
control no-ball boundary[5, 0, '0.0', 1, 1][5, 0, '0.0', 1, 1]Passed
boundary wicket brings new striker[0, 1, '0.2', 0, 3][0, 1, '0.2', 0, 3]Passed
control leg byes[3, 0, '0.2', 1, 2][3, 0, '0.2', 1, 2]Passed
regression: over end rotation[7, 0, '0.3', 1, 1][7, 0, '0.3', 1, 1]Passed
regression: over end rotation[7, 0, '1.0', 1, 1][7, 0, '1.0', 1, 2]Failed
variant scenario 1[6, 0, '0.3', 1, 1][6, 0, '0.3', 1, 1]Passed
variant scenario 2[18, 0, '1.3', 3, 2][18, 0, '1.3', 3, 1]Failed

SHA-256 / 9afedf64a8f917190c573594274609e8a6489bdb29a03d908b3caf92e272b169

2 / The unsuccessful fix

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(events):
    total = wickets = legal = extras = 0
    striker, non = 1, 2
    next_bat = 3
    for e in events:
        if e == 'W':
            wickets += 1
            legal += 1
            striker = next_bat
            next_bat += 1
            ran = 0
        elif e.startswith('wd'):
            k = int(e[2:] or 0)
            total += 1 + k
            extras += 1 + k
            ran = k
        elif e.startswith('nb'):
            k = int(e[2:] or 0)
            total += 1 + k
            extras += 1
            ran = k
        elif e[0] in 'bl':
            k = int(e.lstrip('lb'))
            total += k
            extras += k
            legal += 1
            ran = k
        else:
            k = int(e)
            total += k
            legal += 1
            ran = k
        if ran % 2 == 1:
            striker, non = non, striker
        if legal % 6 == 0:
            striker, non = non, striker
    return [total, wickets, '%d.%d' % (legal // 6, legal % 6), extras, striker]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
def run(args):
    try:
        return solve(*args)
    except Exception as exc:
        return 'raised ' + type(exc).__name__
cases = [[('control maiden over', (['0', '0', '0', '0', '0', '0'],), [0, 0, '1.0', 0, 2]),
  ('boundary single rotates strike', (['1'],), [1, 0, '0.1', 0, 2]),
  ('boundary wide is not a legal ball', (['wd', '4'],), [5, 0, '0.1', 1, 1]),
  ('control no-ball boundary', (['nb4'],), [5, 0, '0.0', 1, 1]),
  ('boundary wicket brings new striker', (['W', '0'],), [0, 1, '0.2', 0, 3]),
  ('control leg byes', (['lb1', '2'],), [3, 0, '0.2', 1, 2]),
  ('regression: over end rotation', (['nb', '2', '0', '4'],), [7, 0, '0.3', 1, 1]),
  ('regression: over end rotation', (['wd', '0', '1', '4', '0', '1', '0'],), [7, 0, '1.0', 1, 2]),
  ('variant scenario 1', (['b1', '4', '1'],), [6, 0, '0.3', 1, 1]),
  ('variant scenario 2',
   (['1', '4', '4', '0', '0', '2', '4', 'b1', '0', 'wd1'],),
   [18, 0, '1.3', 3, 1])],
 [('control maiden over', (['0', '0', '0', '0', '0', '0'],), [0, 0, '1.0', 0, 2]),
  ('boundary single rotates strike', (['1'],), [1, 0, '0.1', 0, 2]),
  ('boundary wide is not a legal ball', (['wd', '4'],), [5, 0, '0.1', 1, 1]),
  ('control no-ball boundary', (['nb4'],), [5, 0, '0.0', 1, 1]),
  ('boundary wicket brings new striker', (['W', '0'],), [0, 1, '0.2', 0, 3]),
  ('control leg byes', (['lb1', '2'],), [3, 0, '0.2', 1, 2]),
  ('regression: over end rotation',
   (['nb4', '1', '0', 'nb1', '1', 'W', '0', '0', 'wd4', '1', 'b4', '1'],),
   [20, 1, '1.3', 11, 1]),
  ('variant scenario 1',
   (['1', '3', '4', 'nb1', 'wd', '4', '0', '4', '1', '1', 'wd1', '1', 'nb', 'lb2'],),
   [27, 0, '1.4', 7, 1]),
  ('variant scenario 2', (['6', 'lb2', '1'],), [9, 0, '0.3', 2, 2])],
 [('control maiden over', (['0', '0', '0', '0', '0', '0'],), [0, 0, '1.0', 0, 2]),
  ('boundary single rotates strike', (['1'],), [1, 0, '0.1', 0, 2]),
  ('boundary wide is not a legal ball', (['wd', '4'],), [5, 0, '0.1', 1, 1]),
  ('control no-ball boundary', (['nb4'],), [5, 0, '0.0', 1, 1]),
  ('boundary wicket brings new striker', (['W', '0'],), [0, 1, '0.2', 0, 3]),
  ('control leg byes', (['lb1', '2'],), [3, 0, '0.2', 1, 2]),
  ('regression: over end rotation',
   (['0', 'b1', 'b1', '0', '1', '1', 'b4', '0', 'nb4', '0'],),
   [13, 0, '1.3', 7, 2]),
  ('regression: over end rotation',
   (['wd1',
     '2',
     'b1',
     'wd1',
     'nb',
     '4',
     '1',
     'wd',
     '1',
     '0',
     'wd1',
     'wd',
     '2',
     '0',
     'nb4',
     '1',
     '1',
     'wd',
     'wd1',
     '6'],),
   [36, 0, '1.5', 14, 1]),
  ('variant scenario 1',
   (['1', '2', 'nb1', '3', '1', 'nb', '0', 'W', '4', '0', '1', '0', 'b1', 'nb', '1', '3', 'lb1'],),
   [22, 1, '2.2', 5, 2]),
  ('variant scenario 2',
   (['1', '0', '1', '1', '2', 'b1', '4', '1', 'nb', '2', '4', '4', '6', 'lb2', 'wd4', 'W'],),
   [35, 1, '2.2', 9, 3])],
 [('control maiden over', (['0', '0', '0', '0', '0', '0'],), [0, 0, '1.0', 0, 2]),
  ('boundary single rotates strike', (['1'],), [1, 0, '0.1', 0, 2]),
  ('boundary wide is not a legal ball', (['wd', '4'],), [5, 0, '0.1', 1, 1]),
  ('control no-ball boundary', (['nb4'],), [5, 0, '0.0', 1, 1]),
  ('boundary wicket brings new striker', (['W', '0'],), [0, 1, '0.2', 0, 3]),
  ('control leg byes', (['lb1', '2'],), [3, 0, '0.2', 1, 2]),
  ('regression: over end rotation',
   (['4',
     'nb',
     '4',
     '3',
     'b4',
     '1',
     '1',
     'W',
     'nb4',
     '6',
     '1',
     '0',
     'b4',
     'nb4',
     '2',
     '1',
     '0',
     'W',
     '2',
     '0',
     'lb1',
     '1'],),
   [46, 2, '3.1', 12, 3]),
  ('regression: over end rotation',
   (['wd',
     '1',
     'nb4',
     'wd1',
     '1',
     'wd',
     '2',
     '1',
     'nb4',
     '1',
     '1',
     '4',
     'wd4',
     '4',
     '6',
     '0',
     'wd1',
     '6'],),
   [48, 0, '1.5', 13, 1]),
  ('variant scenario 1',
   (['W', 'wd1', '3', 'wd4', '4', 'b1', '3', 'wd', 'b1'],),
   [20, 1, '1.0', 10, 3]),
  ('variant scenario 2',
   (['0',
     '6',
     'b1',
     'wd1',
     'lb2',
     'lb1',
     'lb1',
     'nb1',
     '0',
     'W',
     '4',
     'lb1',
     '0',
     '1',
     'nb4',
     '1',
     '0'],),
   [27, 1, '2.2', 10, 3])],
 [('control maiden over', (['0', '0', '0', '0', '0', '0'],), [0, 0, '1.0', 0, 2]),
  ('boundary single rotates strike', (['1'],), [1, 0, '0.1', 0, 2]),
  ('boundary wide is not a legal ball', (['wd', '4'],), [5, 0, '0.1', 1, 1]),
  ('control no-ball boundary', (['nb4'],), [5, 0, '0.0', 1, 1]),
  ('boundary wicket brings new striker', (['W', '0'],), [0, 1, '0.2', 0, 3]),
  ('control leg byes', (['lb1', '2'],), [3, 0, '0.2', 1, 2]),
  ('regression: over end rotation',
   (['lb2',
     '4',
     '2',
     '4',
     '2',
     'b4',
     'wd',
     '1',
     'wd4',
     '4',
     'nb1',
     '6',
     '6',
     'nb',
     '1',
     'nb4',
     '0',
     '1',
     '4',
     '1',
     'nb1',
     '2',
     'nb'],),
   [61, 0, '2.4', 17, 1]),
  ('regression: over end rotation',
   (['4', '4', 'W', '2', 'nb4', '0', 'nb4', '6'],),
   [26, 1, '1.0', 2, 2]),
  ('variant scenario 1',
   (['lb1',
     'wd4',
     '0',
     '6',
     'W',
     '1',
     '2',
     'b1',
     '0',
     '1',
     'wd4',
     '0',
     '1',
     '0',
     '1',
     'wd',
     '1',
     '3',
     '6',
     '2',
     '0',
     'W',
     'wd',
     'b4'],),
   [42, 2, '3.2', 18, 4]),
  ('variant scenario 2', (['0', '1', '4', 'wd', '1', 'b1'],), [8, 0, '0.5', 2, 2])]]
for label, args, expected in cases[N - 1]:
    check(label, run(args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
control maiden over[0, 0, '1.0', 0, 2][0, 0, '1.0', 0, 2]Passed
boundary single rotates strike[1, 0, '0.1', 0, 2][1, 0, '0.1', 0, 2]Passed
boundary wide is not a legal ball[5, 0, '0.1', 1, 2][5, 0, '0.1', 1, 1]Failed
control no-ball boundary[5, 0, '0.0', 1, 2][5, 0, '0.0', 1, 1]Failed
boundary wicket brings new striker[0, 1, '0.2', 0, 3][0, 1, '0.2', 0, 3]Passed
control leg byes[3, 0, '0.2', 1, 2][3, 0, '0.2', 1, 2]Passed
regression: over end rotation[7, 0, '0.3', 1, 2][7, 0, '0.3', 1, 1]Failed
regression: over end rotation[7, 0, '1.0', 1, 1][7, 0, '1.0', 1, 2]Failed
variant scenario 1[6, 0, '0.3', 1, 1][6, 0, '0.3', 1, 1]Passed
variant scenario 2[18, 0, '1.3', 3, 1][18, 0, '1.3', 3, 1]Passed

SHA-256 / b833cd3b2a228ab6177c6899b2b82cfed41a31b6805e5754b985c4bef4995558

3 / The verified repair

Exit 0
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(events):
    total = wickets = legal = extras = 0
    striker, non = 1, 2
    next_bat = 3
    for e in events:
        if e == 'W':
            wickets += 1
            legal += 1
            striker = next_bat
            next_bat += 1
            ran = 0
        elif e.startswith('wd'):
            k = int(e[2:] or 0)
            total += 1 + k
            extras += 1 + k
            ran = k
        elif e.startswith('nb'):
            k = int(e[2:] or 0)
            total += 1 + k
            extras += 1
            ran = k
        elif e[0] in 'bl':
            k = int(e.lstrip('lb'))
            total += k
            extras += k
            legal += 1
            ran = k
        else:
            k = int(e)
            total += k
            legal += 1
            ran = k
        if ran % 2 == 1:
            striker, non = non, striker
        if e[:2] not in ('wd', 'nb') and legal % 6 == 0:
            striker, non = non, striker
    return [total, wickets, '%d.%d' % (legal // 6, legal % 6), extras, striker]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
def run(args):
    try:
        return solve(*args)
    except Exception as exc:
        return 'raised ' + type(exc).__name__
cases = [[('control maiden over', (['0', '0', '0', '0', '0', '0'],), [0, 0, '1.0', 0, 2]),
  ('boundary single rotates strike', (['1'],), [1, 0, '0.1', 0, 2]),
  ('boundary wide is not a legal ball', (['wd', '4'],), [5, 0, '0.1', 1, 1]),
  ('control no-ball boundary', (['nb4'],), [5, 0, '0.0', 1, 1]),
  ('boundary wicket brings new striker', (['W', '0'],), [0, 1, '0.2', 0, 3]),
  ('control leg byes', (['lb1', '2'],), [3, 0, '0.2', 1, 2]),
  ('regression: over end rotation', (['nb', '2', '0', '4'],), [7, 0, '0.3', 1, 1]),
  ('regression: over end rotation', (['wd', '0', '1', '4', '0', '1', '0'],), [7, 0, '1.0', 1, 2]),
  ('variant scenario 1', (['b1', '4', '1'],), [6, 0, '0.3', 1, 1]),
  ('variant scenario 2',
   (['1', '4', '4', '0', '0', '2', '4', 'b1', '0', 'wd1'],),
   [18, 0, '1.3', 3, 1])],
 [('control maiden over', (['0', '0', '0', '0', '0', '0'],), [0, 0, '1.0', 0, 2]),
  ('boundary single rotates strike', (['1'],), [1, 0, '0.1', 0, 2]),
  ('boundary wide is not a legal ball', (['wd', '4'],), [5, 0, '0.1', 1, 1]),
  ('control no-ball boundary', (['nb4'],), [5, 0, '0.0', 1, 1]),
  ('boundary wicket brings new striker', (['W', '0'],), [0, 1, '0.2', 0, 3]),
  ('control leg byes', (['lb1', '2'],), [3, 0, '0.2', 1, 2]),
  ('regression: over end rotation',
   (['nb4', '1', '0', 'nb1', '1', 'W', '0', '0', 'wd4', '1', 'b4', '1'],),
   [20, 1, '1.3', 11, 1]),
  ('variant scenario 1',
   (['1', '3', '4', 'nb1', 'wd', '4', '0', '4', '1', '1', 'wd1', '1', 'nb', 'lb2'],),
   [27, 0, '1.4', 7, 1]),
  ('variant scenario 2', (['6', 'lb2', '1'],), [9, 0, '0.3', 2, 2])],
 [('control maiden over', (['0', '0', '0', '0', '0', '0'],), [0, 0, '1.0', 0, 2]),
  ('boundary single rotates strike', (['1'],), [1, 0, '0.1', 0, 2]),
  ('boundary wide is not a legal ball', (['wd', '4'],), [5, 0, '0.1', 1, 1]),
  ('control no-ball boundary', (['nb4'],), [5, 0, '0.0', 1, 1]),
  ('boundary wicket brings new striker', (['W', '0'],), [0, 1, '0.2', 0, 3]),
  ('control leg byes', (['lb1', '2'],), [3, 0, '0.2', 1, 2]),
  ('regression: over end rotation',
   (['0', 'b1', 'b1', '0', '1', '1', 'b4', '0', 'nb4', '0'],),
   [13, 0, '1.3', 7, 2]),
  ('regression: over end rotation',
   (['wd1',
     '2',
     'b1',
     'wd1',
     'nb',
     '4',
     '1',
     'wd',
     '1',
     '0',
     'wd1',
     'wd',
     '2',
     '0',
     'nb4',
     '1',
     '1',
     'wd',
     'wd1',
     '6'],),
   [36, 0, '1.5', 14, 1]),
  ('variant scenario 1',
   (['1', '2', 'nb1', '3', '1', 'nb', '0', 'W', '4', '0', '1', '0', 'b1', 'nb', '1', '3', 'lb1'],),
   [22, 1, '2.2', 5, 2]),
  ('variant scenario 2',
   (['1', '0', '1', '1', '2', 'b1', '4', '1', 'nb', '2', '4', '4', '6', 'lb2', 'wd4', 'W'],),
   [35, 1, '2.2', 9, 3])],
 [('control maiden over', (['0', '0', '0', '0', '0', '0'],), [0, 0, '1.0', 0, 2]),
  ('boundary single rotates strike', (['1'],), [1, 0, '0.1', 0, 2]),
  ('boundary wide is not a legal ball', (['wd', '4'],), [5, 0, '0.1', 1, 1]),
  ('control no-ball boundary', (['nb4'],), [5, 0, '0.0', 1, 1]),
  ('boundary wicket brings new striker', (['W', '0'],), [0, 1, '0.2', 0, 3]),
  ('control leg byes', (['lb1', '2'],), [3, 0, '0.2', 1, 2]),
  ('regression: over end rotation',
   (['4',
     'nb',
     '4',
     '3',
     'b4',
     '1',
     '1',
     'W',
     'nb4',
     '6',
     '1',
     '0',
     'b4',
     'nb4',
     '2',
     '1',
     '0',
     'W',
     '2',
     '0',
     'lb1',
     '1'],),
   [46, 2, '3.1', 12, 3]),
  ('regression: over end rotation',
   (['wd',
     '1',
     'nb4',
     'wd1',
     '1',
     'wd',
     '2',
     '1',
     'nb4',
     '1',
     '1',
     '4',
     'wd4',
     '4',
     '6',
     '0',
     'wd1',
     '6'],),
   [48, 0, '1.5', 13, 1]),
  ('variant scenario 1',
   (['W', 'wd1', '3', 'wd4', '4', 'b1', '3', 'wd', 'b1'],),
   [20, 1, '1.0', 10, 3]),
  ('variant scenario 2',
   (['0',
     '6',
     'b1',
     'wd1',
     'lb2',
     'lb1',
     'lb1',
     'nb1',
     '0',
     'W',
     '4',
     'lb1',
     '0',
     '1',
     'nb4',
     '1',
     '0'],),
   [27, 1, '2.2', 10, 3])],
 [('control maiden over', (['0', '0', '0', '0', '0', '0'],), [0, 0, '1.0', 0, 2]),
  ('boundary single rotates strike', (['1'],), [1, 0, '0.1', 0, 2]),
  ('boundary wide is not a legal ball', (['wd', '4'],), [5, 0, '0.1', 1, 1]),
  ('control no-ball boundary', (['nb4'],), [5, 0, '0.0', 1, 1]),
  ('boundary wicket brings new striker', (['W', '0'],), [0, 1, '0.2', 0, 3]),
  ('control leg byes', (['lb1', '2'],), [3, 0, '0.2', 1, 2]),
  ('regression: over end rotation',
   (['lb2',
     '4',
     '2',
     '4',
     '2',
     'b4',
     'wd',
     '1',
     'wd4',
     '4',
     'nb1',
     '6',
     '6',
     'nb',
     '1',
     'nb4',
     '0',
     '1',
     '4',
     '1',
     'nb1',
     '2',
     'nb'],),
   [61, 0, '2.4', 17, 1]),
  ('regression: over end rotation',
   (['4', '4', 'W', '2', 'nb4', '0', 'nb4', '6'],),
   [26, 1, '1.0', 2, 2]),
  ('variant scenario 1',
   (['lb1',
     'wd4',
     '0',
     '6',
     'W',
     '1',
     '2',
     'b1',
     '0',
     '1',
     'wd4',
     '0',
     '1',
     '0',
     '1',
     'wd',
     '1',
     '3',
     '6',
     '2',
     '0',
     'W',
     'wd',
     'b4'],),
   [42, 2, '3.2', 18, 4]),
  ('variant scenario 2', (['0', '1', '4', 'wd', '1', 'b1'],), [8, 0, '0.5', 2, 2])]]
for label, args, expected in cases[N - 1]:
    check(label, run(args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
control maiden over[0, 0, '1.0', 0, 2][0, 0, '1.0', 0, 2]Passed
boundary single rotates strike[1, 0, '0.1', 0, 2][1, 0, '0.1', 0, 2]Passed
boundary wide is not a legal ball[5, 0, '0.1', 1, 1][5, 0, '0.1', 1, 1]Passed
control no-ball boundary[5, 0, '0.0', 1, 1][5, 0, '0.0', 1, 1]Passed
boundary wicket brings new striker[0, 1, '0.2', 0, 3][0, 1, '0.2', 0, 3]Passed
control leg byes[3, 0, '0.2', 1, 2][3, 0, '0.2', 1, 2]Passed
regression: over end rotation[7, 0, '0.3', 1, 1][7, 0, '0.3', 1, 1]Passed
regression: over end rotation[7, 0, '1.0', 1, 2][7, 0, '1.0', 1, 2]Passed
variant scenario 1[6, 0, '0.3', 1, 1][6, 0, '0.3', 1, 1]Passed
variant scenario 2[18, 0, '1.3', 3, 1][18, 0, '1.3', 3, 1]Passed

SHA-256 / 4286b015339345fb7e09ce29b0a5e3eb9b6704648ef54094f2c3f5b5e0513209

Verification & scope

Stipulated, bounded toy contract stated in the contract field; not a claim of conformance with any governing body rulebook or operator house rules. 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.

Observations recorded using Python 3.12.14 at 2026-09-29T14:50:26.754212+00:00.

Case digest / 736ad96914b6158fe62fac0909feefff090feb14f09315bf612cce03e1cc6076