FA-83827 / Card game rule engines / Member archive

Threes can be melded · case 02

A meld of threes is accepted.

Member previewVariant 2 · 3 implementations · 8 checks per implementation

Case contract

Input a meld (cards; "JK" joker and deuces are wild). Valid: >= 3 cards, >= 2 naturals of one rank (not threes), at most 3 wild cards. Card points: joker 50, A and 2 20, 8-K 10, 4-7 and black 3 5. A canasta (7+ cards) earns 500 if natural, 300 if mixed. Return [valid|invalid, bonus, card_points].

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
meld case 3	`["valid", 0, 90]`	`["invalid", 0, 0]`	Failed

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