How the Board & Support Work
Spiral No Neighbours uses a four-by-four board. Choose 3, 4 or 5 mines; the initial legal-board counts are 364, 715 and 792 respectively. Each legal board is equally likely. Read cells in zero-based order 0,1,2,3,7,11,15,14,13,12,8,4,5,6,10,9: two consecutive entries cannot both contain mines. This reading-order rule does not forbid every geometrically adjacent pair.
Payout Formula & 1000x Cap
After a safe reveal, gross quote = 0.96 × captured stake × initial legal-board count ÷ remaining compatible-board count. The stake is debited at the start; gross return includes the returned stake, so net round change is gross return minus captured stake. A mine returns zero. With 3 mines, safely revealing cell 0 leaves 286 of 364 boards and gives 1.221818… times stake; safely revealing cells 0,1,2 leaves 165 and gives 2.117818… times stake. Cell indices here start at zero; button labels start at one.
Controls & Modes
Stake choices are 10,20,50,100,200 virtual coins. Stake, mine count and refill are locked during a round; sound remains available. Manual bank is available after at least one safe reveal. Certain mines and safe transitions above 1000 times stake are disabled. All safe cells revealed or no eligible reveal remaining automatically banks the current quote. There is no automatic round queue.
Stopping Rules & Auto-Bank
A mine ends the round with zero gross return. Manual bank ends it after a safe reveal. Revealing all safe cells or having no eligible covered cell remaining automatically banks the current quote. The cap disables individual above-cap actions before a reveal.
Wallet & Refill Facts
A fresh wallet starts at 1000 virtual coins. While idle below 10, manual refill sets the integer balance to exactly 1000 and preserves fractional carry. Settled balance, including zero, and fractional carry persist in this browser when its site storage remains available. Reloading an unfinished round loses that round without refund or resume: its stake has already been debited. The demo has no account, deposits or withdrawals; its coins have no cash value.
Privacy & Storage
The game saves demo balance and fractional carry in browser localStorage. Clearing cached files alone may leave this site storage intact; removing site storage can reset these local values. This guide declares Google Fonts and uses a Statinside counter in the page build. These observations are not a complete inventory of network requests or data processing, and do not establish anonymity, a retention period or absence of other processing.
Frequently asked questions
What is the exact RTP for Spiral No Neighbours?
A legal safe path followed by banking has expected gross return 96% of stake before integer settlement with carried fractions. This is not a promised session result.
How is the board support defined?
The board is drawn uniformly from all 4×4 configurations satisfying the "no two consecutive mines" rule along the clockwise outer spiral followed by the four inner cells. This defines a finite support set specific to the mine count.
What happens if I hit the 1000x cap?
Cells whose safe quote would exceed 1000 times the stake are disabled. The current quote is not automatically banked at the cap; it banks only when no eligible reveal remains or you manually bank.
How does the manual refill work?
When idle and the balance is below 10, a manual refill sets the integer wallet to exactly 1000. It preserves fractional carry. It does not add 1000 coins to the existing balance; it sets the balance to 1000.
Does the demo use local storage?
Balance and fractional carry are saved in this browser’s localStorage while site storage remains available. Clearing cached files alone may leave them intact. This does not establish security or anonymity. An unfinished round is lost on reload without refund.
Is there an account login in the demo?
No. The demo has no account login flow. Virtual coins have no cash value and no payment flow exists.
What are the mine count options?
The choices are 3, 4 or 5 mines, with initial legal-board counts of 364, 715 and 792 respectively.
How is the gross quote calculated?
Gross quote = 0.96 × captured stake × initial support size / current compatible support size. This applies after each safe reveal.
What happens if I reload during a round?
An unfinished round ends on reload without refund or resume. The settled balance persists locally, but the round state does not.
Is there auto-queue for reveals?
No. There is no auto queue. Reveals are manual. Sound remains available during the round.
Does fractional carry persist?
Yes. Fractional carry persists across settlement, refill, and reload.
What is the intended audience for this guide?
The 18+ label is this guide's own intended audience policy, not a claim about local law or an implemented age gate.
