FA-84028 / Sports scoring and tiebreakers / Member archive

Goals scored consulted before goal difference · case 03

Two teams level on points are ordered by goals scored when goal difference should decide.

Member previewVariant 3 · 3 implementations · 9 checks per implementation

Case contract

Round-robin football table. results rows are [home, home_goals, away, away_goals]. A win is 3 points, a draw 1. Rank by points, then goal difference, then goals scored, then head-to-head points among the teams still level on all three (only matches between those teams), then team name. Return rows [team, played, points, goal_difference, goals_for].

Why this case matters

League tables drive promotion, relegation and seeding; the tiebreaker cascade order matters.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
boundary head to head decides	`[["Brent", 2, 3, 0, 3], ["Ashby", 2, 3, 0, 3], ["Corby", 1, 3, 1, 2], ["Dover", 1, 0, -1, 1]]`	`[["Corby", 1, 3, 1, 2], ["Brent", 2, 3, 0, 3], ["Ashby", 2, 3, 0, 3], ["Dover", 1, 0, -1, 1]]`	Failed

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