Mirror Subsequences Demo Guide

The game draws two independent uniform two-digit tickets from 00–99, retaining leading zeros. These tickets are concatenated in order to form a four-digit sequence. The score is based on the length of the longest palindromic subsequence (L), which allows deleting digits while keeping their relative order. The raw score is calculated as max(0, L−2). Note that contiguous substring length is not used.

One whole captured stake covers both tickets. The game offers three scoring modes, each separately normalized over all 10,000 equally likely ordered ticket pairs to achieve a 96% expected gross return. The gross payout is calculated as:

Gross = 0.96 × captured whole stake × raw^p / meanForPower(p), where p is 1, 2 or 3 and the corresponding means are 0.281, 0.301 and 0.341

The exact means for the modes are:

• Power 1: 0.281
• Power 2: 0.301
• Power 3: 0.341

Powers one, two, and three do not alter which raw scores are zero. The expected gross return is 96%, which is not a guaranteed net profit.

The demo includes specific controls for managing draws:

• Stake & Mode: One whole captured stake is used. You can choose between score, score squared, or score cubed modes. These are locked during active settlement.
• Auto10: This queues at most ten captured draws. It allows for automated play up to ten rounds.
• Stop: Cancels future draws while the current draw settles. There is no early bank-out feature.
• Settlement Time: Each draw normally settles after 480ms of animation; reduced-motion mode can settle earlier.
• Sound: Remains available even when controls are locked.

Settings (stake, mode) and refill are locked until the settlement and any auto queue finish.

The demo wallet operates independently of any external account system:

• Initial Balance: The demo starts with a balance of 1,000 virtual coins.
• Restoration: When idle and the balance drops below 10, you can manually restore it. This action sets the balance to exactly 1,000. It is not an automatic replenishment or a deposit of additional coins.
• Fractional Carry: Fractional values persist across settlement, refill, and reload events.
• Reload Behavior: If you reload the page during an unfinished draw, the round ends without a refund or resume capability.
• Persistence: Settled balances are stored locally. However, reloading ends unfinished rounds.

The following table presents the exact expected gross RTP and measured RTP from simulation data. These are sample observations, not promised session returns.

Simulation measurements are distinct from the mathematical payout law. The exact expected value is 96% for all modes.

Based on the actual game.js pure score function, here are specific outcomes for ordered symbols:

• 0, 0, 0, 0: Raw Score = 2
• 9, 9, 9, 9: Raw Score = 2
• 0, 1, 2, 3: Raw Score = 0

These examples illustrate how the longest palindromic subsequence is calculated. Note that a raw score of 0 results in a gross payout of 0 regardless of the mode selected.

This demo uses browser localStorage to store the settled demo balance and fractional carry. This does not establish anonymity or exclude other processing. The template declares a Google Fonts stylesheet, but actual browser request capture is pending. These observations do not provide a complete account of data processing by the site or its infrastructure. There is no account login flow or payment flow in this demo.