FA-84286 / Sports scoring and tiebreakers / Open access

Countback skips failures at the best height · case 01

An athlete with a first-attempt clearance at the best height is ranked below one who needed three.

Verified by executionVariant 1 · 8 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

Only total failures are compared after best height.

VERIFIED REPAIR

Compare failures at the best height before total failures.

Unsuccessful approach: Comparing total failures before failures at the best height applies the countback steps in the wrong order.

Case contract

High jump placing. records rows are [name, [[height_cm, attempts], ...]] where attempts is a string of X (failure), O (clearance) or "-" (pass). Best height is the highest cleared. Rank by best height descending, then fewest failures at the best height, then fewest total failures at heights up to and including the best; athletes equal on all three share the place (the next place is skipped). Athletes without a clearance come last with place None in name order. Return [place, name, best].

Why this case matters

Vertical jump results depend on countback rules that are easy to misapply.

1 / The failure

Exit 1

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

N = 1
observations = []
def solve(records):
    rows = []
    nh = []
    for name, heights in records:
        cleared = [h for h, s in heights if 'O' in s]
        if not cleared:
            nh.append(name)
            continue
        best = max(cleared)
        at_best = sum(s.count('X') for h, s in heights if h == best)
        total = sum(s.count('X') for h, s in heights if h <= best)
        rows.append((-best, total, total, name))
    rows.sort()
    out = []
    for i, r in enumerate(rows):
        if i and rows[i - 1][:3] == r[:3]:
            place = out[-1][0]
        else:
            place = i + 1
        out.append([place, r[3], -r[0]])
    for name in sorted(nh):
        out.append([None, name, None])
    return out
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 higher clearance wins',
   ([['Ade', [[180, 'O'], [183, 'XXX']]], ['Bo', [[180, 'O'], [183, 'O']]]],),
   [[1, 'Bo', 183], [2, 'Ade', 180]]),
  ('boundary fewer misses at best',
   ([['Ade', [[180, 'XO']]], ['Bo', [[180, 'O']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary total misses countback',
   ([['Ade', [[177, 'XO'], [180, 'O'], [183, 'XXX']]],
     ['Bo', [[177, 'O'], [180, 'O'], [183, 'XXX']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary true tie shares place',
   ([['Cy', [[180, 'XO']]], ['Ade', [[180, 'XO']]], ['Bo', [[177, 'O']]]],),
   [[1, 'Ade', 180], [1, 'Cy', 180], [3, 'Bo', 177]]),
  ('control no height',
   ([['Dee', [[180, 'XXX']]], ['Ade', [[180, 'O']]]],),
   [[1, 'Ade', 180], [None, 'Dee', None]]),
  ('regression: best height misses',
   ([['Dee', [[180, 'O'], [183, 'X-'], [186, 'O'], [189, 'XO']]],
     ['Bo', [[180, 'XX-'], [183, 'O'], [186, 'XXO'], [189, 'O']]]],),
   [[1, 'Bo', 189], [2, 'Dee', 189]]),
  ('variant scenario 1',
   ([['Cy', [[180, 'O'], [183, 'O'], [186, 'O']]],
     ['Eli', [[180, '-'], [183, 'XXX']]],
     ['Ade', [[180, 'X-'], [183, 'XO'], [186, 'XXX']]],
     ['Dee', [[180, 'XXX']]],
     ['Fay', [[180, 'XX-'], [183, 'O'], [186, 'XO']]]],),
   [[1, 'Cy', 186], [2, 'Fay', 186], [3, 'Ade', 183], [None, 'Dee', None], [None, 'Eli', None]]),
  ('variant scenario 2',
   ([['Bo', [[180, 'X-'], [183, 'XXX']]], ['Cy', [[180, 'XO'], [183, 'XX-'], [186, 'O']]]],),
   [[1, 'Cy', 186], [None, 'Bo', None]])],
 [('control higher clearance wins',
   ([['Ade', [[180, 'O'], [183, 'XXX']]], ['Bo', [[180, 'O'], [183, 'O']]]],),
   [[1, 'Bo', 183], [2, 'Ade', 180]]),
  ('boundary fewer misses at best',
   ([['Ade', [[180, 'XO']]], ['Bo', [[180, 'O']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary total misses countback',
   ([['Ade', [[177, 'XO'], [180, 'O'], [183, 'XXX']]],
     ['Bo', [[177, 'O'], [180, 'O'], [183, 'XXX']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary true tie shares place',
   ([['Cy', [[180, 'XO']]], ['Ade', [[180, 'XO']]], ['Bo', [[177, 'O']]]],),
   [[1, 'Ade', 180], [1, 'Cy', 180], [3, 'Bo', 177]]),
  ('control no height',
   ([['Dee', [[180, 'XXX']]], ['Ade', [[180, 'O']]]],),
   [[1, 'Ade', 180], [None, 'Dee', None]]),
  ('regression: best height misses',
   ([['Cy', [[180, 'O'], [183, 'XXO'], [186, 'XX-']]],
     ['Bo', [[180, 'O'], [183, 'O'], [186, 'XXO']]],
     ['Dee', [[180, 'XXX']]],
     ['Eli', [[180, 'XO'], [183, 'O'], [186, '-']]],
     ['Ade', [[180, 'XO'], [183, 'X-'], [186, 'O']]]],),
   [[1, 'Ade', 186], [2, 'Bo', 186], [3, 'Eli', 183], [4, 'Cy', 183], [None, 'Dee', None]]),
  ('regression: best height misses',
   ([['Cy', [[180, 'XX-'], [183, 'XXO'], [186, 'XO'], [189, 'O'], [192, 'XO']]],
     ['Bo', [[180, 'XX-'], [183, 'XO'], [186, 'XXO'], [189, 'XX-'], [192, 'O']]],
     ['Dee', [[180, 'XO'], [183, 'XXO'], [186, 'XO'], [189, 'O'], [192, '-']]],
     ['Fay', [[180, 'XXO'], [183, 'XO'], [186, 'XX-'], [189, 'O'], [192, 'XX-']]],
     ['Eli', [[180, 'O'], [183, 'O'], [186, 'O'], [189, 'XX-'], [192, 'O']]]],),
   [[1, 'Eli', 192], [2, 'Bo', 192], [3, 'Cy', 192], [4, 'Dee', 189], [5, 'Fay', 189]]),
  ('variant scenario 1',
   ([['Eli', [[180, 'O'], [183, 'XXO'], [186, 'XXX']]],
     ['Ade', [[180, 'O'], [183, 'XXX']]],
     ['Dee', [[180, 'O'], [183, 'XO'], [186, 'O'], [189, 'XO'], [192, 'X-']]]],),
   [[1, 'Dee', 189], [2, 'Eli', 183], [3, 'Ade', 180]]),
  ('variant scenario 2',
   ([['Fay', [[180, 'XXX']]],
     ['Ade', [[180, 'XO'], [183, 'XO'], [186, 'XO'], [189, '-'], [192, 'XO']]],
     ['Bo', [[180, 'XO'], [183, '-'], [186, 'XO'], [189, 'O'], [192, 'XXO']]]],),
   [[1, 'Ade', 192], [2, 'Bo', 192], [None, 'Fay', None]])],
 [('control higher clearance wins',
   ([['Ade', [[180, 'O'], [183, 'XXX']]], ['Bo', [[180, 'O'], [183, 'O']]]],),
   [[1, 'Bo', 183], [2, 'Ade', 180]]),
  ('boundary fewer misses at best',
   ([['Ade', [[180, 'XO']]], ['Bo', [[180, 'O']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary total misses countback',
   ([['Ade', [[177, 'XO'], [180, 'O'], [183, 'XXX']]],
     ['Bo', [[177, 'O'], [180, 'O'], [183, 'XXX']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary true tie shares place',
   ([['Cy', [[180, 'XO']]], ['Ade', [[180, 'XO']]], ['Bo', [[177, 'O']]]],),
   [[1, 'Ade', 180], [1, 'Cy', 180], [3, 'Bo', 177]]),
  ('control no height',
   ([['Dee', [[180, 'XXX']]], ['Ade', [[180, 'O']]]],),
   [[1, 'Ade', 180], [None, 'Dee', None]]),
  ('regression: best height misses',
   ([['Ade', [[180, 'O'], [183, 'XXO'], [186, 'O'], [189, 'XO']]],
     ['Eli', [[180, 'O'], [183, '-'], [186, 'XO'], [189, 'XXO']]],
     ['Fay', [[180, 'XO'], [183, 'XXX']]],
     ['Bo', [[180, 'XO'], [183, 'O'], [186, '-'], [189, 'O']]],
     ['Dee', [[180, 'O'], [183, 'XX-'], [186, 'X-'], [189, 'XXO']]]],),
   [[1, 'Bo', 189], [2, 'Ade', 189], [3, 'Eli', 189], [4, 'Dee', 189], [5, 'Fay', 180]]),
  ('regression: best height misses',
   ([['Ade', [[180, 'O'], [183, 'XXX']]],
     ['Dee', [[180, 'O'], [183, 'XO'], [186, '-']]],
     ['Bo', [[180, 'XX-'], [183, 'O'], [186, 'XXX']]]],),
   [[1, 'Bo', 183], [2, 'Dee', 183], [3, 'Ade', 180]]),
  ('variant scenario 1',
   ([['Eli', [[180, 'O'], [183, 'XX-'], [186, 'O'], [189, '-'], [192, 'XX-']]],
     ['Bo', [[180, 'XO'], [183, 'O'], [186, 'X-'], [189, 'X-'], [192, 'XXX']]],
     ['Cy', [[180, 'XO'], [183, 'O'], [186, 'O'], [189, 'XXX']]],
     ['Fay', [[180, 'X-'], [183, 'XXX']]]],),
   [[1, 'Cy', 186], [2, 'Eli', 186], [3, 'Bo', 183], [None, 'Fay', None]]),
  ('variant scenario 2',
   ([['Dee', [[180, 'O'], [183, 'XO'], [186, 'X-']]],
     ['Cy', [[180, 'XO'], [183, 'XO'], [186, 'XX-']]]],),
   [[1, 'Dee', 183], [2, 'Cy', 183]])],
 [('control higher clearance wins',
   ([['Ade', [[180, 'O'], [183, 'XXX']]], ['Bo', [[180, 'O'], [183, 'O']]]],),
   [[1, 'Bo', 183], [2, 'Ade', 180]]),
  ('boundary fewer misses at best',
   ([['Ade', [[180, 'XO']]], ['Bo', [[180, 'O']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary total misses countback',
   ([['Ade', [[177, 'XO'], [180, 'O'], [183, 'XXX']]],
     ['Bo', [[177, 'O'], [180, 'O'], [183, 'XXX']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary true tie shares place',
   ([['Cy', [[180, 'XO']]], ['Ade', [[180, 'XO']]], ['Bo', [[177, 'O']]]],),
   [[1, 'Ade', 180], [1, 'Cy', 180], [3, 'Bo', 177]]),
  ('control no height',
   ([['Dee', [[180, 'XXX']]], ['Ade', [[180, 'O']]]],),
   [[1, 'Ade', 180], [None, 'Dee', None]]),
  ('regression: best height misses',
   ([['Cy', [[180, 'XO'], [183, 'XO'], [186, 'XX-']]],
     ['Dee', [[180, 'XXO'], [183, 'XX-'], [186, 'O']]],
     ['Ade', [[180, 'O'], [183, 'XXO'], [186, '-']]]],),
   [[1, 'Dee', 186], [2, 'Cy', 183], [3, 'Ade', 183]]),
  ('regression: best height misses',
   ([['Eli', [[180, 'O'], [183, 'O'], [186, 'O'], [189, 'XXO']]],
     ['Ade', [[180, 'O'], [183, 'O'], [186, 'XXO'], [189, '-']]],
     ['Fay', [[180, 'X-'], [183, 'XXO'], [186, 'XX-'], [189, 'XXO']]],
     ['Dee', [[180, 'XXO'], [183, 'X-'], [186, 'O'], [189, 'XXX']]],
     ['Cy', [[180, 'XXX']]]],),
   [[1, 'Eli', 189], [2, 'Fay', 189], [3, 'Dee', 186], [4, 'Ade', 186], [None, 'Cy', None]]),
  ('variant scenario 1',
   ([['Dee', [[180, 'XO'], [183, 'XXO'], [186, 'O'], [189, 'XO']]],
     ['Fay', [[180, 'XO'], [183, 'O'], [186, 'XXX']]],
     ['Ade', [[180, 'X-'], [183, '-'], [186, '-'], [189, 'XO']]],
     ['Eli', [[180, 'XO'], [183, '-'], [186, 'XX-'], [189, 'XO']]]],),
   [[1, 'Ade', 189], [2, 'Dee', 189], [2, 'Eli', 189], [4, 'Fay', 183]]),
  ('variant scenario 2',
   ([['Ade', [[180, '-'], [183, '-'], [186, 'XO']]],
     ['Cy', [[180, 'O'], [183, 'O'], [186, 'O']]],
     ['Eli', [[180, '-'], [183, 'XO'], [186, '-']]]],),
   [[1, 'Cy', 186], [2, 'Ade', 186], [3, 'Eli', 183]])],
 [('control higher clearance wins',
   ([['Ade', [[180, 'O'], [183, 'XXX']]], ['Bo', [[180, 'O'], [183, 'O']]]],),
   [[1, 'Bo', 183], [2, 'Ade', 180]]),
  ('boundary fewer misses at best',
   ([['Ade', [[180, 'XO']]], ['Bo', [[180, 'O']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary total misses countback',
   ([['Ade', [[177, 'XO'], [180, 'O'], [183, 'XXX']]],
     ['Bo', [[177, 'O'], [180, 'O'], [183, 'XXX']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary true tie shares place',
   ([['Cy', [[180, 'XO']]], ['Ade', [[180, 'XO']]], ['Bo', [[177, 'O']]]],),
   [[1, 'Ade', 180], [1, 'Cy', 180], [3, 'Bo', 177]]),
  ('control no height',
   ([['Dee', [[180, 'XXX']]], ['Ade', [[180, 'O']]]],),
   [[1, 'Ade', 180], [None, 'Dee', None]]),
  ('regression: best height misses',
   ([['Eli', [[180, 'X-'], [183, 'O'], [186, 'XXO'], [189, 'O'], [192, 'O']]],
     ['Cy', [[180, 'O'], [183, 'O'], [186, 'XO'], [189, 'XO'], [192, 'XO']]],
     ['Bo', [[180, 'O'], [183, 'X-'], [186, 'XO'], [189, 'XO'], [192, 'XX-']]],
     ['Dee', [[180, 'XX-'], [183, 'O'], [186, 'O'], [189, 'XXO'], [192, 'XO']]],
     ['Ade', [[180, 'O'], [183, 'O'], [186, '-'], [189, 'XO'], [192, 'O']]]],),
   [[1, 'Ade', 192], [2, 'Eli', 192], [3, 'Cy', 192], [4, 'Dee', 192], [5, 'Bo', 189]]),
  ('regression: best height misses',
   ([['Eli', [[180, 'O'], [183, 'XX-'], [186, 'XXX']]],
     ['Ade', [[180, 'XXO'], [183, 'O'], [186, 'O']]],
     ['Bo', [[180, '-'], [183, 'O'], [186, 'XXO']]],
     ['Cy', [[180, 'XX-'], [183, 'XXO'], [186, 'O']]]],),
   [[1, 'Ade', 186], [2, 'Cy', 186], [3, 'Bo', 186], [4, 'Eli', 180]]),
  ('variant scenario 1',
   ([['Cy', [[180, '-'], [183, 'O'], [186, 'O'], [189, 'XO'], [192, 'O'], [195, 'XXX']]],
     ['Dee', [[180, 'XXX']]],
     ['Bo', [[180, 'X-'], [183, 'O'], [186, 'XXO'], [189, 'XO'], [192, 'XX-'], [195, 'XXX']]],
     ['Eli', [[180, 'XO'], [183, '-'], [186, '-'], [189, 'O'], [192, 'O'], [195, 'XO']]]],),
   [[1, 'Eli', 195], [2, 'Cy', 192], [3, 'Bo', 189], [None, 'Dee', None]]),
  ('variant scenario 2',
   ([['Fay', [[180, 'XXX']]], ['Eli', [[180, 'O'], [183, '-'], [186, 'XO']]]],),
   [[1, 'Eli', 186], [None, 'Fay', None]])]]
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 fixture	Actual	Expected	Outcome
control higher clearance wins	`[[1, 'Bo', 183], [2, 'Ade', 180]]`	`[[1, 'Bo', 183], [2, 'Ade', 180]]`	Passed
boundary fewer misses at best	`[[1, 'Bo', 180], [2, 'Ade', 180]]`	`[[1, 'Bo', 180], [2, 'Ade', 180]]`	Passed
boundary total misses countback	`[[1, 'Bo', 180], [2, 'Ade', 180]]`	`[[1, 'Bo', 180], [2, 'Ade', 180]]`	Passed
boundary true tie shares place	`[[1, 'Ade', 180], [1, 'Cy', 180], [3, 'Bo', 177]]`	`[[1, 'Ade', 180], [1, 'Cy', 180], [3, 'Bo', 177]]`	Passed
control no height	`[[1, 'Ade', 180], [None, 'Dee', None]]`	`[[1, 'Ade', 180], [None, 'Dee', None]]`	Passed
regression: best height misses	`[[1, 'Dee', 189], [2, 'Bo', 189]]`	`[[1, 'Bo', 189], [2, 'Dee', 189]]`	Failed
variant scenario 1	`[[1, 'Cy', 186], [2, 'Fay', 186], [3, 'Ade', 183], [None, 'Dee', None], [None, 'Eli', None]]`	`[[1, 'Cy', 186], [2, 'Fay', 186], [3, 'Ade', 183], [None, 'Dee', None], [None, 'Eli', None]]`	Passed
variant scenario 2	`[[1, 'Cy', 186], [None, 'Bo', None]]`	`[[1, 'Cy', 186], [None, 'Bo', None]]`	Passed

SHA-256 / 97b6133cc78a33a9257925c7d46389878001cfd460fed3dd1f0604dbb434a41e

2 / The unsuccessful fix

Exit 1

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

N = 1
observations = []
def solve(records):
    rows = []
    nh = []
    for name, heights in records:
        cleared = [h for h, s in heights if 'O' in s]
        if not cleared:
            nh.append(name)
            continue
        best = max(cleared)
        at_best = sum(s.count('X') for h, s in heights if h == best)
        total = sum(s.count('X') for h, s in heights if h <= best)
        rows.append((-best, total, at_best, name))
    rows.sort()
    out = []
    for i, r in enumerate(rows):
        if i and rows[i - 1][:3] == r[:3]:
            place = out[-1][0]
        else:
            place = i + 1
        out.append([place, r[3], -r[0]])
    for name in sorted(nh):
        out.append([None, name, None])
    return out
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 higher clearance wins',
   ([['Ade', [[180, 'O'], [183, 'XXX']]], ['Bo', [[180, 'O'], [183, 'O']]]],),
   [[1, 'Bo', 183], [2, 'Ade', 180]]),
  ('boundary fewer misses at best',
   ([['Ade', [[180, 'XO']]], ['Bo', [[180, 'O']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary total misses countback',
   ([['Ade', [[177, 'XO'], [180, 'O'], [183, 'XXX']]],
     ['Bo', [[177, 'O'], [180, 'O'], [183, 'XXX']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary true tie shares place',
   ([['Cy', [[180, 'XO']]], ['Ade', [[180, 'XO']]], ['Bo', [[177, 'O']]]],),
   [[1, 'Ade', 180], [1, 'Cy', 180], [3, 'Bo', 177]]),
  ('control no height',
   ([['Dee', [[180, 'XXX']]], ['Ade', [[180, 'O']]]],),
   [[1, 'Ade', 180], [None, 'Dee', None]]),
  ('regression: best height misses',
   ([['Dee', [[180, 'O'], [183, 'X-'], [186, 'O'], [189, 'XO']]],
     ['Bo', [[180, 'XX-'], [183, 'O'], [186, 'XXO'], [189, 'O']]]],),
   [[1, 'Bo', 189], [2, 'Dee', 189]]),
  ('variant scenario 1',
   ([['Cy', [[180, 'O'], [183, 'O'], [186, 'O']]],
     ['Eli', [[180, '-'], [183, 'XXX']]],
     ['Ade', [[180, 'X-'], [183, 'XO'], [186, 'XXX']]],
     ['Dee', [[180, 'XXX']]],
     ['Fay', [[180, 'XX-'], [183, 'O'], [186, 'XO']]]],),
   [[1, 'Cy', 186], [2, 'Fay', 186], [3, 'Ade', 183], [None, 'Dee', None], [None, 'Eli', None]]),
  ('variant scenario 2',
   ([['Bo', [[180, 'X-'], [183, 'XXX']]], ['Cy', [[180, 'XO'], [183, 'XX-'], [186, 'O']]]],),
   [[1, 'Cy', 186], [None, 'Bo', None]])],
 [('control higher clearance wins',
   ([['Ade', [[180, 'O'], [183, 'XXX']]], ['Bo', [[180, 'O'], [183, 'O']]]],),
   [[1, 'Bo', 183], [2, 'Ade', 180]]),
  ('boundary fewer misses at best',
   ([['Ade', [[180, 'XO']]], ['Bo', [[180, 'O']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary total misses countback',
   ([['Ade', [[177, 'XO'], [180, 'O'], [183, 'XXX']]],
     ['Bo', [[177, 'O'], [180, 'O'], [183, 'XXX']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary true tie shares place',
   ([['Cy', [[180, 'XO']]], ['Ade', [[180, 'XO']]], ['Bo', [[177, 'O']]]],),
   [[1, 'Ade', 180], [1, 'Cy', 180], [3, 'Bo', 177]]),
  ('control no height',
   ([['Dee', [[180, 'XXX']]], ['Ade', [[180, 'O']]]],),
   [[1, 'Ade', 180], [None, 'Dee', None]]),
  ('regression: best height misses',
   ([['Cy', [[180, 'O'], [183, 'XXO'], [186, 'XX-']]],
     ['Bo', [[180, 'O'], [183, 'O'], [186, 'XXO']]],
     ['Dee', [[180, 'XXX']]],
     ['Eli', [[180, 'XO'], [183, 'O'], [186, '-']]],
     ['Ade', [[180, 'XO'], [183, 'X-'], [186, 'O']]]],),
   [[1, 'Ade', 186], [2, 'Bo', 186], [3, 'Eli', 183], [4, 'Cy', 183], [None, 'Dee', None]]),
  ('regression: best height misses',
   ([['Cy', [[180, 'XX-'], [183, 'XXO'], [186, 'XO'], [189, 'O'], [192, 'XO']]],
     ['Bo', [[180, 'XX-'], [183, 'XO'], [186, 'XXO'], [189, 'XX-'], [192, 'O']]],
     ['Dee', [[180, 'XO'], [183, 'XXO'], [186, 'XO'], [189, 'O'], [192, '-']]],
     ['Fay', [[180, 'XXO'], [183, 'XO'], [186, 'XX-'], [189, 'O'], [192, 'XX-']]],
     ['Eli', [[180, 'O'], [183, 'O'], [186, 'O'], [189, 'XX-'], [192, 'O']]]],),
   [[1, 'Eli', 192], [2, 'Bo', 192], [3, 'Cy', 192], [4, 'Dee', 189], [5, 'Fay', 189]]),
  ('variant scenario 1',
   ([['Eli', [[180, 'O'], [183, 'XXO'], [186, 'XXX']]],
     ['Ade', [[180, 'O'], [183, 'XXX']]],
     ['Dee', [[180, 'O'], [183, 'XO'], [186, 'O'], [189, 'XO'], [192, 'X-']]]],),
   [[1, 'Dee', 189], [2, 'Eli', 183], [3, 'Ade', 180]]),
  ('variant scenario 2',
   ([['Fay', [[180, 'XXX']]],
     ['Ade', [[180, 'XO'], [183, 'XO'], [186, 'XO'], [189, '-'], [192, 'XO']]],
     ['Bo', [[180, 'XO'], [183, '-'], [186, 'XO'], [189, 'O'], [192, 'XXO']]]],),
   [[1, 'Ade', 192], [2, 'Bo', 192], [None, 'Fay', None]])],
 [('control higher clearance wins',
   ([['Ade', [[180, 'O'], [183, 'XXX']]], ['Bo', [[180, 'O'], [183, 'O']]]],),
   [[1, 'Bo', 183], [2, 'Ade', 180]]),
  ('boundary fewer misses at best',
   ([['Ade', [[180, 'XO']]], ['Bo', [[180, 'O']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary total misses countback',
   ([['Ade', [[177, 'XO'], [180, 'O'], [183, 'XXX']]],
     ['Bo', [[177, 'O'], [180, 'O'], [183, 'XXX']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary true tie shares place',
   ([['Cy', [[180, 'XO']]], ['Ade', [[180, 'XO']]], ['Bo', [[177, 'O']]]],),
   [[1, 'Ade', 180], [1, 'Cy', 180], [3, 'Bo', 177]]),
  ('control no height',
   ([['Dee', [[180, 'XXX']]], ['Ade', [[180, 'O']]]],),
   [[1, 'Ade', 180], [None, 'Dee', None]]),
  ('regression: best height misses',
   ([['Ade', [[180, 'O'], [183, 'XXO'], [186, 'O'], [189, 'XO']]],
     ['Eli', [[180, 'O'], [183, '-'], [186, 'XO'], [189, 'XXO']]],
     ['Fay', [[180, 'XO'], [183, 'XXX']]],
     ['Bo', [[180, 'XO'], [183, 'O'], [186, '-'], [189, 'O']]],
     ['Dee', [[180, 'O'], [183, 'XX-'], [186, 'X-'], [189, 'XXO']]]],),
   [[1, 'Bo', 189], [2, 'Ade', 189], [3, 'Eli', 189], [4, 'Dee', 189], [5, 'Fay', 180]]),
  ('regression: best height misses',
   ([['Ade', [[180, 'O'], [183, 'XXX']]],
     ['Dee', [[180, 'O'], [183, 'XO'], [186, '-']]],
     ['Bo', [[180, 'XX-'], [183, 'O'], [186, 'XXX']]]],),
   [[1, 'Bo', 183], [2, 'Dee', 183], [3, 'Ade', 180]]),
  ('variant scenario 1',
   ([['Eli', [[180, 'O'], [183, 'XX-'], [186, 'O'], [189, '-'], [192, 'XX-']]],
     ['Bo', [[180, 'XO'], [183, 'O'], [186, 'X-'], [189, 'X-'], [192, 'XXX']]],
     ['Cy', [[180, 'XO'], [183, 'O'], [186, 'O'], [189, 'XXX']]],
     ['Fay', [[180, 'X-'], [183, 'XXX']]]],),
   [[1, 'Cy', 186], [2, 'Eli', 186], [3, 'Bo', 183], [None, 'Fay', None]]),
  ('variant scenario 2',
   ([['Dee', [[180, 'O'], [183, 'XO'], [186, 'X-']]],
     ['Cy', [[180, 'XO'], [183, 'XO'], [186, 'XX-']]]],),
   [[1, 'Dee', 183], [2, 'Cy', 183]])],
 [('control higher clearance wins',
   ([['Ade', [[180, 'O'], [183, 'XXX']]], ['Bo', [[180, 'O'], [183, 'O']]]],),
   [[1, 'Bo', 183], [2, 'Ade', 180]]),
  ('boundary fewer misses at best',
   ([['Ade', [[180, 'XO']]], ['Bo', [[180, 'O']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary total misses countback',
   ([['Ade', [[177, 'XO'], [180, 'O'], [183, 'XXX']]],
     ['Bo', [[177, 'O'], [180, 'O'], [183, 'XXX']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary true tie shares place',
   ([['Cy', [[180, 'XO']]], ['Ade', [[180, 'XO']]], ['Bo', [[177, 'O']]]],),
   [[1, 'Ade', 180], [1, 'Cy', 180], [3, 'Bo', 177]]),
  ('control no height',
   ([['Dee', [[180, 'XXX']]], ['Ade', [[180, 'O']]]],),
   [[1, 'Ade', 180], [None, 'Dee', None]]),
  ('regression: best height misses',
   ([['Cy', [[180, 'XO'], [183, 'XO'], [186, 'XX-']]],
     ['Dee', [[180, 'XXO'], [183, 'XX-'], [186, 'O']]],
     ['Ade', [[180, 'O'], [183, 'XXO'], [186, '-']]]],),
   [[1, 'Dee', 186], [2, 'Cy', 183], [3, 'Ade', 183]]),
  ('regression: best height misses',
   ([['Eli', [[180, 'O'], [183, 'O'], [186, 'O'], [189, 'XXO']]],
     ['Ade', [[180, 'O'], [183, 'O'], [186, 'XXO'], [189, '-']]],
     ['Fay', [[180, 'X-'], [183, 'XXO'], [186, 'XX-'], [189, 'XXO']]],
     ['Dee', [[180, 'XXO'], [183, 'X-'], [186, 'O'], [189, 'XXX']]],
     ['Cy', [[180, 'XXX']]]],),
   [[1, 'Eli', 189], [2, 'Fay', 189], [3, 'Dee', 186], [4, 'Ade', 186], [None, 'Cy', None]]),
  ('variant scenario 1',
   ([['Dee', [[180, 'XO'], [183, 'XXO'], [186, 'O'], [189, 'XO']]],
     ['Fay', [[180, 'XO'], [183, 'O'], [186, 'XXX']]],
     ['Ade', [[180, 'X-'], [183, '-'], [186, '-'], [189, 'XO']]],
     ['Eli', [[180, 'XO'], [183, '-'], [186, 'XX-'], [189, 'XO']]]],),
   [[1, 'Ade', 189], [2, 'Dee', 189], [2, 'Eli', 189], [4, 'Fay', 183]]),
  ('variant scenario 2',
   ([['Ade', [[180, '-'], [183, '-'], [186, 'XO']]],
     ['Cy', [[180, 'O'], [183, 'O'], [186, 'O']]],
     ['Eli', [[180, '-'], [183, 'XO'], [186, '-']]]],),
   [[1, 'Cy', 186], [2, 'Ade', 186], [3, 'Eli', 183]])],
 [('control higher clearance wins',
   ([['Ade', [[180, 'O'], [183, 'XXX']]], ['Bo', [[180, 'O'], [183, 'O']]]],),
   [[1, 'Bo', 183], [2, 'Ade', 180]]),
  ('boundary fewer misses at best',
   ([['Ade', [[180, 'XO']]], ['Bo', [[180, 'O']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary total misses countback',
   ([['Ade', [[177, 'XO'], [180, 'O'], [183, 'XXX']]],
     ['Bo', [[177, 'O'], [180, 'O'], [183, 'XXX']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary true tie shares place',
   ([['Cy', [[180, 'XO']]], ['Ade', [[180, 'XO']]], ['Bo', [[177, 'O']]]],),
   [[1, 'Ade', 180], [1, 'Cy', 180], [3, 'Bo', 177]]),
  ('control no height',
   ([['Dee', [[180, 'XXX']]], ['Ade', [[180, 'O']]]],),
   [[1, 'Ade', 180], [None, 'Dee', None]]),
  ('regression: best height misses',
   ([['Eli', [[180, 'X-'], [183, 'O'], [186, 'XXO'], [189, 'O'], [192, 'O']]],
     ['Cy', [[180, 'O'], [183, 'O'], [186, 'XO'], [189, 'XO'], [192, 'XO']]],
     ['Bo', [[180, 'O'], [183, 'X-'], [186, 'XO'], [189, 'XO'], [192, 'XX-']]],
     ['Dee', [[180, 'XX-'], [183, 'O'], [186, 'O'], [189, 'XXO'], [192, 'XO']]],
     ['Ade', [[180, 'O'], [183, 'O'], [186, '-'], [189, 'XO'], [192, 'O']]]],),
   [[1, 'Ade', 192], [2, 'Eli', 192], [3, 'Cy', 192], [4, 'Dee', 192], [5, 'Bo', 189]]),
  ('regression: best height misses',
   ([['Eli', [[180, 'O'], [183, 'XX-'], [186, 'XXX']]],
     ['Ade', [[180, 'XXO'], [183, 'O'], [186, 'O']]],
     ['Bo', [[180, '-'], [183, 'O'], [186, 'XXO']]],
     ['Cy', [[180, 'XX-'], [183, 'XXO'], [186, 'O']]]],),
   [[1, 'Ade', 186], [2, 'Cy', 186], [3, 'Bo', 186], [4, 'Eli', 180]]),
  ('variant scenario 1',
   ([['Cy', [[180, '-'], [183, 'O'], [186, 'O'], [189, 'XO'], [192, 'O'], [195, 'XXX']]],
     ['Dee', [[180, 'XXX']]],
     ['Bo', [[180, 'X-'], [183, 'O'], [186, 'XXO'], [189, 'XO'], [192, 'XX-'], [195, 'XXX']]],
     ['Eli', [[180, 'XO'], [183, '-'], [186, '-'], [189, 'O'], [192, 'O'], [195, 'XO']]]],),
   [[1, 'Eli', 195], [2, 'Cy', 192], [3, 'Bo', 189], [None, 'Dee', None]]),
  ('variant scenario 2',
   ([['Fay', [[180, 'XXX']]], ['Eli', [[180, 'O'], [183, '-'], [186, 'XO']]]],),
   [[1, 'Eli', 186], [None, 'Fay', None]])]]
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 fixture	Actual	Expected	Outcome
control higher clearance wins	`[[1, 'Bo', 183], [2, 'Ade', 180]]`	`[[1, 'Bo', 183], [2, 'Ade', 180]]`	Passed
boundary fewer misses at best	`[[1, 'Bo', 180], [2, 'Ade', 180]]`	`[[1, 'Bo', 180], [2, 'Ade', 180]]`	Passed
boundary total misses countback	`[[1, 'Bo', 180], [2, 'Ade', 180]]`	`[[1, 'Bo', 180], [2, 'Ade', 180]]`	Passed
boundary true tie shares place	`[[1, 'Ade', 180], [1, 'Cy', 180], [3, 'Bo', 177]]`	`[[1, 'Ade', 180], [1, 'Cy', 180], [3, 'Bo', 177]]`	Passed
control no height	`[[1, 'Ade', 180], [None, 'Dee', None]]`	`[[1, 'Ade', 180], [None, 'Dee', None]]`	Passed
regression: best height misses	`[[1, 'Dee', 189], [2, 'Bo', 189]]`	`[[1, 'Bo', 189], [2, 'Dee', 189]]`	Failed
variant scenario 1	`[[1, 'Cy', 186], [2, 'Fay', 186], [3, 'Ade', 183], [None, 'Dee', None], [None, 'Eli', None]]`	`[[1, 'Cy', 186], [2, 'Fay', 186], [3, 'Ade', 183], [None, 'Dee', None], [None, 'Eli', None]]`	Passed
variant scenario 2	`[[1, 'Cy', 186], [None, 'Bo', None]]`	`[[1, 'Cy', 186], [None, 'Bo', None]]`	Passed

SHA-256 / 90d1d454c34b60a4ebdb3a1c00e937e7088dc1504be6ae1bb578d796d66f83db

3 / The verified repair

Exit 0

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

N = 1
observations = []
def solve(records):
    rows = []
    nh = []
    for name, heights in records:
        cleared = [h for h, s in heights if 'O' in s]
        if not cleared:
            nh.append(name)
            continue
        best = max(cleared)
        at_best = sum(s.count('X') for h, s in heights if h == best)
        total = sum(s.count('X') for h, s in heights if h <= best)
        rows.append((-best, at_best, total, name))
    rows.sort()
    out = []
    for i, r in enumerate(rows):
        if i and rows[i - 1][:3] == r[:3]:
            place = out[-1][0]
        else:
            place = i + 1
        out.append([place, r[3], -r[0]])
    for name in sorted(nh):
        out.append([None, name, None])
    return out
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 higher clearance wins',
   ([['Ade', [[180, 'O'], [183, 'XXX']]], ['Bo', [[180, 'O'], [183, 'O']]]],),
   [[1, 'Bo', 183], [2, 'Ade', 180]]),
  ('boundary fewer misses at best',
   ([['Ade', [[180, 'XO']]], ['Bo', [[180, 'O']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary total misses countback',
   ([['Ade', [[177, 'XO'], [180, 'O'], [183, 'XXX']]],
     ['Bo', [[177, 'O'], [180, 'O'], [183, 'XXX']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary true tie shares place',
   ([['Cy', [[180, 'XO']]], ['Ade', [[180, 'XO']]], ['Bo', [[177, 'O']]]],),
   [[1, 'Ade', 180], [1, 'Cy', 180], [3, 'Bo', 177]]),
  ('control no height',
   ([['Dee', [[180, 'XXX']]], ['Ade', [[180, 'O']]]],),
   [[1, 'Ade', 180], [None, 'Dee', None]]),
  ('regression: best height misses',
   ([['Dee', [[180, 'O'], [183, 'X-'], [186, 'O'], [189, 'XO']]],
     ['Bo', [[180, 'XX-'], [183, 'O'], [186, 'XXO'], [189, 'O']]]],),
   [[1, 'Bo', 189], [2, 'Dee', 189]]),
  ('variant scenario 1',
   ([['Cy', [[180, 'O'], [183, 'O'], [186, 'O']]],
     ['Eli', [[180, '-'], [183, 'XXX']]],
     ['Ade', [[180, 'X-'], [183, 'XO'], [186, 'XXX']]],
     ['Dee', [[180, 'XXX']]],
     ['Fay', [[180, 'XX-'], [183, 'O'], [186, 'XO']]]],),
   [[1, 'Cy', 186], [2, 'Fay', 186], [3, 'Ade', 183], [None, 'Dee', None], [None, 'Eli', None]]),
  ('variant scenario 2',
   ([['Bo', [[180, 'X-'], [183, 'XXX']]], ['Cy', [[180, 'XO'], [183, 'XX-'], [186, 'O']]]],),
   [[1, 'Cy', 186], [None, 'Bo', None]])],
 [('control higher clearance wins',
   ([['Ade', [[180, 'O'], [183, 'XXX']]], ['Bo', [[180, 'O'], [183, 'O']]]],),
   [[1, 'Bo', 183], [2, 'Ade', 180]]),
  ('boundary fewer misses at best',
   ([['Ade', [[180, 'XO']]], ['Bo', [[180, 'O']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary total misses countback',
   ([['Ade', [[177, 'XO'], [180, 'O'], [183, 'XXX']]],
     ['Bo', [[177, 'O'], [180, 'O'], [183, 'XXX']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary true tie shares place',
   ([['Cy', [[180, 'XO']]], ['Ade', [[180, 'XO']]], ['Bo', [[177, 'O']]]],),
   [[1, 'Ade', 180], [1, 'Cy', 180], [3, 'Bo', 177]]),
  ('control no height',
   ([['Dee', [[180, 'XXX']]], ['Ade', [[180, 'O']]]],),
   [[1, 'Ade', 180], [None, 'Dee', None]]),
  ('regression: best height misses',
   ([['Cy', [[180, 'O'], [183, 'XXO'], [186, 'XX-']]],
     ['Bo', [[180, 'O'], [183, 'O'], [186, 'XXO']]],
     ['Dee', [[180, 'XXX']]],
     ['Eli', [[180, 'XO'], [183, 'O'], [186, '-']]],
     ['Ade', [[180, 'XO'], [183, 'X-'], [186, 'O']]]],),
   [[1, 'Ade', 186], [2, 'Bo', 186], [3, 'Eli', 183], [4, 'Cy', 183], [None, 'Dee', None]]),
  ('regression: best height misses',
   ([['Cy', [[180, 'XX-'], [183, 'XXO'], [186, 'XO'], [189, 'O'], [192, 'XO']]],
     ['Bo', [[180, 'XX-'], [183, 'XO'], [186, 'XXO'], [189, 'XX-'], [192, 'O']]],
     ['Dee', [[180, 'XO'], [183, 'XXO'], [186, 'XO'], [189, 'O'], [192, '-']]],
     ['Fay', [[180, 'XXO'], [183, 'XO'], [186, 'XX-'], [189, 'O'], [192, 'XX-']]],
     ['Eli', [[180, 'O'], [183, 'O'], [186, 'O'], [189, 'XX-'], [192, 'O']]]],),
   [[1, 'Eli', 192], [2, 'Bo', 192], [3, 'Cy', 192], [4, 'Dee', 189], [5, 'Fay', 189]]),
  ('variant scenario 1',
   ([['Eli', [[180, 'O'], [183, 'XXO'], [186, 'XXX']]],
     ['Ade', [[180, 'O'], [183, 'XXX']]],
     ['Dee', [[180, 'O'], [183, 'XO'], [186, 'O'], [189, 'XO'], [192, 'X-']]]],),
   [[1, 'Dee', 189], [2, 'Eli', 183], [3, 'Ade', 180]]),
  ('variant scenario 2',
   ([['Fay', [[180, 'XXX']]],
     ['Ade', [[180, 'XO'], [183, 'XO'], [186, 'XO'], [189, '-'], [192, 'XO']]],
     ['Bo', [[180, 'XO'], [183, '-'], [186, 'XO'], [189, 'O'], [192, 'XXO']]]],),
   [[1, 'Ade', 192], [2, 'Bo', 192], [None, 'Fay', None]])],
 [('control higher clearance wins',
   ([['Ade', [[180, 'O'], [183, 'XXX']]], ['Bo', [[180, 'O'], [183, 'O']]]],),
   [[1, 'Bo', 183], [2, 'Ade', 180]]),
  ('boundary fewer misses at best',
   ([['Ade', [[180, 'XO']]], ['Bo', [[180, 'O']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary total misses countback',
   ([['Ade', [[177, 'XO'], [180, 'O'], [183, 'XXX']]],
     ['Bo', [[177, 'O'], [180, 'O'], [183, 'XXX']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary true tie shares place',
   ([['Cy', [[180, 'XO']]], ['Ade', [[180, 'XO']]], ['Bo', [[177, 'O']]]],),
   [[1, 'Ade', 180], [1, 'Cy', 180], [3, 'Bo', 177]]),
  ('control no height',
   ([['Dee', [[180, 'XXX']]], ['Ade', [[180, 'O']]]],),
   [[1, 'Ade', 180], [None, 'Dee', None]]),
  ('regression: best height misses',
   ([['Ade', [[180, 'O'], [183, 'XXO'], [186, 'O'], [189, 'XO']]],
     ['Eli', [[180, 'O'], [183, '-'], [186, 'XO'], [189, 'XXO']]],
     ['Fay', [[180, 'XO'], [183, 'XXX']]],
     ['Bo', [[180, 'XO'], [183, 'O'], [186, '-'], [189, 'O']]],
     ['Dee', [[180, 'O'], [183, 'XX-'], [186, 'X-'], [189, 'XXO']]]],),
   [[1, 'Bo', 189], [2, 'Ade', 189], [3, 'Eli', 189], [4, 'Dee', 189], [5, 'Fay', 180]]),
  ('regression: best height misses',
   ([['Ade', [[180, 'O'], [183, 'XXX']]],
     ['Dee', [[180, 'O'], [183, 'XO'], [186, '-']]],
     ['Bo', [[180, 'XX-'], [183, 'O'], [186, 'XXX']]]],),
   [[1, 'Bo', 183], [2, 'Dee', 183], [3, 'Ade', 180]]),
  ('variant scenario 1',
   ([['Eli', [[180, 'O'], [183, 'XX-'], [186, 'O'], [189, '-'], [192, 'XX-']]],
     ['Bo', [[180, 'XO'], [183, 'O'], [186, 'X-'], [189, 'X-'], [192, 'XXX']]],
     ['Cy', [[180, 'XO'], [183, 'O'], [186, 'O'], [189, 'XXX']]],
     ['Fay', [[180, 'X-'], [183, 'XXX']]]],),
   [[1, 'Cy', 186], [2, 'Eli', 186], [3, 'Bo', 183], [None, 'Fay', None]]),
  ('variant scenario 2',
   ([['Dee', [[180, 'O'], [183, 'XO'], [186, 'X-']]],
     ['Cy', [[180, 'XO'], [183, 'XO'], [186, 'XX-']]]],),
   [[1, 'Dee', 183], [2, 'Cy', 183]])],
 [('control higher clearance wins',
   ([['Ade', [[180, 'O'], [183, 'XXX']]], ['Bo', [[180, 'O'], [183, 'O']]]],),
   [[1, 'Bo', 183], [2, 'Ade', 180]]),
  ('boundary fewer misses at best',
   ([['Ade', [[180, 'XO']]], ['Bo', [[180, 'O']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary total misses countback',
   ([['Ade', [[177, 'XO'], [180, 'O'], [183, 'XXX']]],
     ['Bo', [[177, 'O'], [180, 'O'], [183, 'XXX']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary true tie shares place',
   ([['Cy', [[180, 'XO']]], ['Ade', [[180, 'XO']]], ['Bo', [[177, 'O']]]],),
   [[1, 'Ade', 180], [1, 'Cy', 180], [3, 'Bo', 177]]),
  ('control no height',
   ([['Dee', [[180, 'XXX']]], ['Ade', [[180, 'O']]]],),
   [[1, 'Ade', 180], [None, 'Dee', None]]),
  ('regression: best height misses',
   ([['Cy', [[180, 'XO'], [183, 'XO'], [186, 'XX-']]],
     ['Dee', [[180, 'XXO'], [183, 'XX-'], [186, 'O']]],
     ['Ade', [[180, 'O'], [183, 'XXO'], [186, '-']]]],),
   [[1, 'Dee', 186], [2, 'Cy', 183], [3, 'Ade', 183]]),
  ('regression: best height misses',
   ([['Eli', [[180, 'O'], [183, 'O'], [186, 'O'], [189, 'XXO']]],
     ['Ade', [[180, 'O'], [183, 'O'], [186, 'XXO'], [189, '-']]],
     ['Fay', [[180, 'X-'], [183, 'XXO'], [186, 'XX-'], [189, 'XXO']]],
     ['Dee', [[180, 'XXO'], [183, 'X-'], [186, 'O'], [189, 'XXX']]],
     ['Cy', [[180, 'XXX']]]],),
   [[1, 'Eli', 189], [2, 'Fay', 189], [3, 'Dee', 186], [4, 'Ade', 186], [None, 'Cy', None]]),
  ('variant scenario 1',
   ([['Dee', [[180, 'XO'], [183, 'XXO'], [186, 'O'], [189, 'XO']]],
     ['Fay', [[180, 'XO'], [183, 'O'], [186, 'XXX']]],
     ['Ade', [[180, 'X-'], [183, '-'], [186, '-'], [189, 'XO']]],
     ['Eli', [[180, 'XO'], [183, '-'], [186, 'XX-'], [189, 'XO']]]],),
   [[1, 'Ade', 189], [2, 'Dee', 189], [2, 'Eli', 189], [4, 'Fay', 183]]),
  ('variant scenario 2',
   ([['Ade', [[180, '-'], [183, '-'], [186, 'XO']]],
     ['Cy', [[180, 'O'], [183, 'O'], [186, 'O']]],
     ['Eli', [[180, '-'], [183, 'XO'], [186, '-']]]],),
   [[1, 'Cy', 186], [2, 'Ade', 186], [3, 'Eli', 183]])],
 [('control higher clearance wins',
   ([['Ade', [[180, 'O'], [183, 'XXX']]], ['Bo', [[180, 'O'], [183, 'O']]]],),
   [[1, 'Bo', 183], [2, 'Ade', 180]]),
  ('boundary fewer misses at best',
   ([['Ade', [[180, 'XO']]], ['Bo', [[180, 'O']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary total misses countback',
   ([['Ade', [[177, 'XO'], [180, 'O'], [183, 'XXX']]],
     ['Bo', [[177, 'O'], [180, 'O'], [183, 'XXX']]]],),
   [[1, 'Bo', 180], [2, 'Ade', 180]]),
  ('boundary true tie shares place',
   ([['Cy', [[180, 'XO']]], ['Ade', [[180, 'XO']]], ['Bo', [[177, 'O']]]],),
   [[1, 'Ade', 180], [1, 'Cy', 180], [3, 'Bo', 177]]),
  ('control no height',
   ([['Dee', [[180, 'XXX']]], ['Ade', [[180, 'O']]]],),
   [[1, 'Ade', 180], [None, 'Dee', None]]),
  ('regression: best height misses',
   ([['Eli', [[180, 'X-'], [183, 'O'], [186, 'XXO'], [189, 'O'], [192, 'O']]],
     ['Cy', [[180, 'O'], [183, 'O'], [186, 'XO'], [189, 'XO'], [192, 'XO']]],
     ['Bo', [[180, 'O'], [183, 'X-'], [186, 'XO'], [189, 'XO'], [192, 'XX-']]],
     ['Dee', [[180, 'XX-'], [183, 'O'], [186, 'O'], [189, 'XXO'], [192, 'XO']]],
     ['Ade', [[180, 'O'], [183, 'O'], [186, '-'], [189, 'XO'], [192, 'O']]]],),
   [[1, 'Ade', 192], [2, 'Eli', 192], [3, 'Cy', 192], [4, 'Dee', 192], [5, 'Bo', 189]]),
  ('regression: best height misses',
   ([['Eli', [[180, 'O'], [183, 'XX-'], [186, 'XXX']]],
     ['Ade', [[180, 'XXO'], [183, 'O'], [186, 'O']]],
     ['Bo', [[180, '-'], [183, 'O'], [186, 'XXO']]],
     ['Cy', [[180, 'XX-'], [183, 'XXO'], [186, 'O']]]],),
   [[1, 'Ade', 186], [2, 'Cy', 186], [3, 'Bo', 186], [4, 'Eli', 180]]),
  ('variant scenario 1',
   ([['Cy', [[180, '-'], [183, 'O'], [186, 'O'], [189, 'XO'], [192, 'O'], [195, 'XXX']]],
     ['Dee', [[180, 'XXX']]],
     ['Bo', [[180, 'X-'], [183, 'O'], [186, 'XXO'], [189, 'XO'], [192, 'XX-'], [195, 'XXX']]],
     ['Eli', [[180, 'XO'], [183, '-'], [186, '-'], [189, 'O'], [192, 'O'], [195, 'XO']]]],),
   [[1, 'Eli', 195], [2, 'Cy', 192], [3, 'Bo', 189], [None, 'Dee', None]]),
  ('variant scenario 2',
   ([['Fay', [[180, 'XXX']]], ['Eli', [[180, 'O'], [183, '-'], [186, 'XO']]]],),
   [[1, 'Eli', 186], [None, 'Fay', None]])]]
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 fixture	Actual	Expected	Outcome
control higher clearance wins	`[[1, 'Bo', 183], [2, 'Ade', 180]]`	`[[1, 'Bo', 183], [2, 'Ade', 180]]`	Passed
boundary fewer misses at best	`[[1, 'Bo', 180], [2, 'Ade', 180]]`	`[[1, 'Bo', 180], [2, 'Ade', 180]]`	Passed
boundary total misses countback	`[[1, 'Bo', 180], [2, 'Ade', 180]]`	`[[1, 'Bo', 180], [2, 'Ade', 180]]`	Passed
boundary true tie shares place	`[[1, 'Ade', 180], [1, 'Cy', 180], [3, 'Bo', 177]]`	`[[1, 'Ade', 180], [1, 'Cy', 180], [3, 'Bo', 177]]`	Passed
control no height	`[[1, 'Ade', 180], [None, 'Dee', None]]`	`[[1, 'Ade', 180], [None, 'Dee', None]]`	Passed
regression: best height misses	`[[1, 'Bo', 189], [2, 'Dee', 189]]`	`[[1, 'Bo', 189], [2, 'Dee', 189]]`	Passed
variant scenario 1	`[[1, 'Cy', 186], [2, 'Fay', 186], [3, 'Ade', 183], [None, 'Dee', None], [None, 'Eli', None]]`	`[[1, 'Cy', 186], [2, 'Fay', 186], [3, 'Ade', 183], [None, 'Dee', None], [None, 'Eli', None]]`	Passed
variant scenario 2	`[[1, 'Cy', 186], [None, 'Bo', None]]`	`[[1, 'Cy', 186], [None, 'Bo', None]]`	Passed

SHA-256 / 6b118f507fb4400b1e2b3252ff0b488f0d33dea0038bd8fea80431b9f16cf5cc

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 2026-09-29T14:50:29.395929+00:00.

Case digest / 601e2c707e5e181cc578148d55cd0318565bf02cdf2d1e264ded23be85667ae6