FA-83543 / Card game rule engines / Member archive

Sub-runs inside a longer run are also scored · case 03

A four-card run also scores its two three-card sub-runs.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

Input [four_card_hand, starter, is_crib]. Fifteens (any 2-5 cards, A=1, T/J/Q/K=10) score 2; each pair 2; runs score their length for every distinct combination of the longest run length; a four-card hand flush scores 4 (+1 with the starter) but the crib scores only a five-card flush; a hand jack matching the starter suit scores 1. Return the total.

Why this case matters

Card-game engines, scoring apps and online tables apply this rule automatically on every hand.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
hand score case 6	`10`	`4`	Failed

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