The scope of this independent guide
The query 81D does not establish an outside gaming company, licence, business history, or official application. Ten Unit Knapsack names this guide’s own virtual-coin demonstration. Its rules and mathematical evidence do not certify an outside product or establish that another service uses the same mechanic. A page name or search position alone cannot verify another service’s identity.
One whole stake for one draw
Choose 10, 20, 50 or 100 virtual coins and a reward power before starting. Starting deducts the whole stake immediately and captures those settings. Stake, mode and refill remain locked until the complete draw settles; sound remains available. This interface has no Auto queue, Stop button or early collection. The four displayed readings belong to the same paid draw. The optimization is calculated automatically and requires no strategic selection.
Three calibrated reward powers
The modes use the raw score, its square and its cube. Each mode has its own mean over all 4,096 equally likely four-reading draws. The gross return multiplier is 0.96 times the selected score power divided by that mean. Multiplying by the captured stake gives the unrounded return. Whole coins settle while fractional change carries into the next settlement. Expected gross return is 96% in each mode; this is neither a win probability nor a guaranteed session result.
Manual balance restoration
A new local wallet starts at 1,000 virtual coins. While idle and below 10, its refill button sets the balance to exactly 1,000. It neither adds 1,000 nor happens automatically. Fractional payout carry survives settlement, refill, and reload. The coins have no cash value; this demo has no deposit or withdrawal flow.
Reload and unfinished draws
The game reads the stored settled balance and fractional carry on reload, including a stored zero balance. Reloading an active draw ends it without refund or resume: its captured stake remains deducted. Clearing local storage can remove the saved state. Clearing cached resource files and clearing local storage are different actions; this guide does not recommend deleting storage as login troubleshooting.
Observed storage and font declarations
The game source uses localStorage for the balance and fractional carry. Its template declares a Google Fonts stylesheet. These observations do not establish a complete network inventory, anonymity, an absence of other processing, or any third party privacy policy. The absence of account and payment forms is a property of this demo interface; it does not prove that no personal data are processed elsewhere.
Frequently asked questions
What is the raw score?
The largest total profit of a subset whose four item weights sum to at most 10.
Is 96% the chance of winning?
No. It is expected gross return, not win probability or a guaranteed session result.
When can I restore the wallet?
Only while idle with a balance below 10.