Independent guide · original demo · 18+

Mosaic Seams: Probability and Payout Guide

The official website of 69y.

The official website of 69y. This guide explains the worked probability and payout mechanics for the Mosaic Seams demo. It covers how gross returns are calculated, how stakes are managed, and how settlements occur without external cash flow.

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Game Mechanics and Payout Structure

Mosaic Seams uses four independent tiles, each displaying one of three equally likely shapes. You count matching adjacent pairs across three seams. Each match returns 0.96 times the gross stake. The possible total returns are 0x, 0.96x, 1.92x, or 2.88x. Stakes can be set to 10, 25, 50, or 100, with 25 as the default. The stake is deducted once at the start of the round and persists before any animation begins.

Probability and Expected Return

Each of the three equal adjacent pair indicators has a probability of 1/3. The linear expectation is calculated as 3 * (1/3) * 0.96, resulting in an expected return of 0.96. Simulation data from one million rounds shows a simulated RTP of 96.164352, closely matching the expected 96%. Gross returns include the stake, meaning the total returned is higher than the net profit. Any fractional carry is kept separately and credited as whole coins after applying the floor function.

Wallet Rules and Settlement

The initial balance is 1000 virtual coins. If the balance drops below 10 while idle, you can manually restore it to 1000. This sets the balance to 1000 rather than adding that amount. Fractional hundredths are persisted separately. If you reload the page, any unfinished round is discarded without refund or resume. Automatic settlement occurs at the chosen exit or end of reveal. Controls are disabled while the round is active.

Frequently asked questions

Is this a real money gambling site?

No, this is a demo using virtual coins with no cash value. There is no cashier, deposit, or withdrawal. The site is unverified and does not represent a licensed operator.

How is the stake handled if I leave the page?

The stake is deducted at the start. If you reload, the unfinished round is discarded without refund. You cannot resume the same round later.