The coins have no cash value, deposits, withdrawals or prizes. External licences, apps, accounts and payment services are not established by this guide.
An original lamp-board demo
999L is a search name rather than a verified operator identity. This guide offers its own Lamp Workshop demo; its rules do not describe an outside company, application or commercial game.
The coins have no cash value, deposits, withdrawals or prizes. External licences, apps, accounts and payment services are not established by this guide.
Nine fair lamps and an automatic clearing mask
Each round samples nine independent fair bits on a3×3 board. Pressing a cell in the mathematical model toggles that lamp and its orthogonal neighbours. The program computes and displays the clearing mask automatically; the player does not solve the board interactively.
For this exact3×3 geometry every one of the512 boards has a unique clearing mask. Its number of presses ranges0–9, so raw reward is1 plus that number, always1–10. There are no impossible boards or zero raw rewards.
Complete enumeration and independent linear algebra
All512 boards and all512 press masks are enumerated. An independent binary Gaussian elimination verifies rank9 and the unique clearing mask for every board.
Three million actual-source rounds check one million per power. Four threshold edges test fair bit sampling. These checks support the local demo calculation and do not certify an outside operator.
Local wallet and page requests
The demo does not require customer registration, identity documents or bank details. Saving the wallet locally does not mean all page requests stay on the device.
Font, analytics, server and CDN requests can transmit IP addresses and request information. This guide does not promise complete anonymity, no profiling, no data sale or a particular retention period. It does not establish an outside product’s data practices.
Free virtual balance and manual restoration
The initial balance is 1,000 free virtual coins, with no monetary value or prizes. Settled balance and fractional payout carry are stored in browser localStorage when available. Whole coins are credited and the remaining fraction is kept for later settlements.
Only while idle and below 10 whole coins can the refill button restore the balance to 1,000. It sets that balance rather than adding 1,000 and preserves fractional carry. Reloading does not automatically refill the wallet.
Frequently asked questions
How does the board work?
Each round samples nine independent fair bits on a3×3 board. Pressing a cell in the mathematical model toggles that lamp and its orthogonal neighbours. The program computes and displays the clearing mask automatically; the player does not solve the board interactively. For this exact3×3 geometry every one of the512 boards has a unique clearing mask. Its number of presses ranges0–9, so raw reward is1 plus that number, always1–10. There are no impossible boards or zero raw rewards.
What are the exact reward means?
The counts for raw rewards1–10 are1,9,36,84,126,126,84,36,9,1. Means of raw, raw² and raw³ are5.5,32.5 and203.5. Select power1,2 or3 before starting. Gross multiplier is0.96×raw^power/E(raw^power). Each mode has96% expected gross return without an optimal-play assumption. Positive payouts can be less than the stake, so a positive raw reward does not guarantee a profit.
Which examples are possible?
The all-off initial board needs zero presses and rewards1. A board produced by toggling one chosen cell has the unique one-press solution and rewards2. A board produced by pressing all nine cells has a nine-press solution and rewards10. The reward grows with the computed solution length. Fewer presses do not produce a larger reward, and clicks do not alter a captured round or its payout.
Read the lamp rules and try the original free demo. Play the free demo
