FA-84654 / Betting odds conversion / Member archive

System total stake computed per selection or per line size · case 04

A yankee is charged 4 units instead of 11.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Full-cover system bets. system: trixie (3 selections: doubles and treble), patent (3: singles, doubles, treble), yankee (4: doubles, trebles, fourfold), lucky15 (4: singles through fourfold). Wrong selection count returns "invalid". Every combination is a line staked unit_cents; a line with a losing selection returns 0; void selections count as price 1. Return [lines, total stake, total return rounded down].

Why this case matters

Bookmaker settlement expands system bets into combination lines before pricing each one.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
control trixie all win	`[4, 300, 2000]`	`[4, 400, 2000]`	Failed

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