The two official scorers at a cricket match agree their totals at the end of every over. The frequency is not fussiness; it is the only interval at which an error is still recoverable.
What actually gets compared
At the end of an over the scorers confirm the team total, the two batters' individual scores, the bowler's analysis, and the count of extras. Four figures that must be mutually consistent.
The check works because the entries are redundant by design. Runs are recorded once against the batter and once against the bowler, so any single mistake breaks the equality immediately.
If the figures agree, both scorers are almost certainly correct. If they disagree, the discrepancy is confined to six deliveries that both of them just watched.
Why the window closes so fast
Reconstructing a disputed run requires remembering what happened, and cricket presents a fresh event every thirty seconds or so. Six balls later, the specific delivery has been overwritten in memory.
Video review can rescue a professional match, but it is slow and it is not available at most levels of the game. Recall is the primary tool, and recall has a short half-life.
Checking every over keeps the search space to one over. Checking at the innings break would mean auditing a hundred and twenty deliveries to find a single missing run.
The errors this catches
The common failures are mundane. A leg bye recorded as a run to the batter, an overthrow credited to the wrong player, a bowler's over count drifting by one.
None of these change the team total, which is exactly why they are dangerous. A total that looks right can conceal two offsetting errors in individual columns that nobody would otherwise notice.
The over-by-over check finds them because it compares the components, not just the sum. An audit of the bottom line alone would pass a scorecard that is internally wrong.
How the umpires participate
Umpires signal every scoring event deliberately and hold the signal until a scorer acknowledges it. That handshake is part of the protocol rather than a courtesy.
Without acknowledgment the umpire does not know the signal was received. A boundary signaled to a scorer who was writing something else is precisely the run that goes missing.
Umpires also carry their own count of deliveries in the over, giving a third independent record. Three counts of the same thing is generous, and it is why over-count disputes are rare.
What the practice implies about live scores
The number on a broadcast graphic has usually not been reconciled yet. It reflects one scorer's entry, transmitted immediately, ahead of the check that confirms it.
Corrections that appear mid-innings are the visible edge of this process. A total that quietly moves by a run is a reconciliation resolving, not a broadcast glitch.
Readers treating a live score as final are reading a provisional figure. The settled version arrives at the close, after both books have been agreed and signed.
