FA-84674 / Betting odds conversion / Member archive

Only one of several withdrawals deducted · case 04

Two withdrawals of 4.00 and 6.00 deduct 25p instead of 40p.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Non-runner deduction for a winning bet. Each withdrawn runner's decimal price maps to pence-in-the-pound from the first band whose limit it does not exceed: [('1.30', 75), ('1.40', 70), ('1.53', 65), ('1.62', 60), ('1.80', 55), ('1.95', 50), ('2.20', 45), ('2.50', 40), ('2.75', 35), ('3.25', 30), ('4.00', 25), ('5.00', 20), ('6.50', 15), ('10.00', 10), ('15.00', 5)]; above 15.00 it is 0. Deductions from several withdrawals are summed and capped at 75. The deduction applies to winnings only: return = stake + floor(stake * (price - 1) * (100 - deduction) / 100). Return [deduction, return cents].

Why this case matters

Racing settlement reduces winnings when a runner is withdrawn after prices were struck.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
boundary cap at 75	`[65, 1700]`	`[75, 1500]`	Failed

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