f61 Demo Use: Virtual Coins and Round Limits

This guide explains its own virtual-coin browser demo on f61.top. An outside operator, business identity, licence, official app or payment service for the queried name has not been established. The source-observable game and wallet rules described here do not verify an outside service or provide a verdict on its reputation.

The demo has no account registration, sign-in, deposit or withdrawal flow. Its virtual coins have no cash value and cannot be exchanged or withdrawn. Refill changes only the local demo wallet; banking collects only the current round’s virtual quote. These controls do not verify any outside bank, card, payment gateway, processing time or commercial service associated with the query.

The board has four rows, four columns and exactly four mines. Number columns from zero on the left. Columns 0 and 2 must have the same parity of mine count and different counts; columns 1 and 3 must have the same parity, but their counts may be equal. Matching parity allows two odd counts as well as two even counts. There are 370 legal boards. One is sampled uniformly when a round starts and remains fixed throughout that round.

You can bank manually after the first safe reveal. Revealing all twelve safe cells or having no eligible reveal remaining banks the current quote automatically. Proven mines and previously revealed cells are unavailable. An individual move whose prospective quote would exceed 1,000× stake is disabled. With this particular 370-board support, however, the maximum reachable quote is 355.2× stake, so the 1,000× guard is never reached.

The integer wallet, including zero, and the separate fractional payout remainder persist in this browser’s localStorage. The stake deduction is saved when a round starts. Reloading an unfinished round does not resume it or refund that stake: the reduced balance remains saved. There is no account recovery, cross-device synchronisation or saved active-round state. A settled balance can persist across ordinary reloads.

This guide is intended for adults aged 18 and over; it is not intended for children. That is the guide’s own audience policy, rather than a universal statement of law or an implemented age-verification gate. Virtual coins have no cash value. The demo does not establish an outside operator’s legal status or provide enforceable terms for an outside account service.