CS2 trade-ups by collection

A contract that swaps ten skins of one grade for one skin of the next grade up, drawn from the collections the ten came from. StatTrak inputs give a StatTrak outcome, and all ten have to match on that.

92 collections have at least one step, 315 steps in all: Consumer Grade to Industrial Grade: 38 collections; Industrial Grade to Mil-Spec Grade: 46 collections; Mil-Spec Grade to Restricted: 88 collections; Restricted to Classified: 78 collections; Classified to Covert: 65 collections.

Yes. Each input hands its own collection a tenth of the odds, then the outcome is drawn evenly inside the collection that wins. Seven from one and three from another is a 70/30 split between the two pools.

Yes. The game places each input inside its own skin's range, averages those positions and maps the result into the outcome's range, so inputs that sit low in their own ranges land a cleaner outcome, whatever their raw floats say.