FA-83974 / Sports scoring and tiebreakers / Member archive

Net run rate rounded before subtracting the two rates · case 04

The published net run rate differs by 0.001 from the exact value.

Member previewVariant 4 · 3 implementations · 10 checks per implementation

Case contract

Tournament net run rate. Each match row is [runs_for, overs_faced, all_out_for, runs_against, overs_bowled, all_out_against]. Overs strings use cricket notation "O.B" where B is balls 0-5 ("43.4" = 43 overs 4 balls); a ball digit above 5 returns "invalid overs". When a side was all out its innings counts as the full quota of overs. NRR = total runs for / total overs faced - total runs against / total overs bowled, aggregated over all matches before dividing, formatted as "%+.3f" of the exact value. If either overs total is zero return "no overs".

Why this case matters

Group-stage standings use net run rate as the first tiebreaker after points.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
regression: rounding stage	`"-0.708"`	`"-0.707"`	Failed

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