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.
Three powered rewards with exact96% expectation
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.
Clear boards and nine-press masks
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.
Captured choices and a ten-round queue
Select stake10,20,50 or100 and power1,2 or3 before starting. One stake is deducted once; stake, power and refill lock while one round resolves.
Auto starts at most ten settled rounds and stops earlier if the captured stake cannot be paid. Stop prevents future starts and lets the active round settle. There is no cashout. Sound is optional and reduced motion shortens the animation without changing the board or payment.
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.
How do the controls work?
Select stake10,20,50 or100 and power1,2 or3 before starting. One stake is deducted once; stake, power and refill lock while one round resolves. Auto starts at most ten settled rounds and stops earlier if the captured stake cannot be paid. Stop prevents future starts and lets the active round settle. There is no cashout. Sound is optional and reduced motion shortens the animation without changing the board or payment.
When can I refill?
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.
Read the lamp rules and try the original free demo. Play the free demo
