FA-85927 / Game economy crafting balance / Member archive

Banner pity counter: Pity is not reset on a hit · case 02

After a top-rarity hit the next hit arrives far too early.

Member previewVariant 2 · 3 implementations · 8 checks per implementation

Case contract

Each roll is 0..999. Pull number n = pity+1. Top-rarity rate is 6 per mille, plus 50*(n-73) from n >= 74 (soft pity); n >= 90 always hits. On a hit pity resets to 0; the item is featured ("F") if guarantee is set or the roll is even, otherwise lost ("L") and the guarantee is set; a featured hit clears the guarantee. Misses ("-") set pity = n.

Why this case matters

Game economies leak or destroy currency when one crafting or pricing rule is off by one boundary, rounding stage or state update; the defect is observable in exact integer outcomes.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
first soft pity pull #1	`{"guarantee": false, "pity": 75, "results": "-F"}`	`{"guarantee": false, "pity": 0, "results": "-F"}`	Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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