Guide

9JJ: Bit Gap Roulette Rules and Exact Score Bands

The official website of 9jj. Bit Gap Roulette draws two independent uniform pocket readings from 0 through 12, giving 169 equally likely ordered pairs. Express each reading with four binary bits. The score is the Hamming distance: the number of positions whose bits differ. For readings 0 (0000) and 1 (0001), the score is 1. For readings 3 (0011) and 12 (1100), all four bits differ and the score is 4. The rule belongs only to this original demo.

Play the free demo

Four-Bit Hamming Distance

Bit Gap Roulette draws two independent uniform pocket readings from 0 through 12, giving 169 equally likely ordered pairs. Express each reading with four binary bits. The score is the Hamming distance: the number of positions whose bits differ. For readings 0 (0000) and 1 (0001), the score is 1. For readings 3 (0011) and 12 (1100), all four bits differ and the score is 4. The rule belongs only to this original demo.

Before starting, choose one of three score-band tickets. Band one contains score 0 and occurs in 13 of 169 pairs. Band two contains scores 1 and 2 and occurs in 106 pairs. Band three contains scores 3 and 4 and occurs in 50 pairs. These are bands of attainable scores, not equal-probability bets. Exactly one band contains the final score. Starting deducts one captured stake and locks the ticket, stake settings and restoration. The first reading is incomplete and pays nothing. After the second reading, a matching ticket returns the captured stake multiplied by 0.96 divided by its exact hit probability, including the stake in that gross credit. A miss returns zero. There is no intermediate collection or extra charge. The exact gross multipliers are 162.24/13, 162.24/106 and 162.24/50, approximately 12.480000×, 1.530566× and 3.244800×.

Three Exact Score Bands

Before starting, choose one of three score-band tickets. Band one contains score 0 and occurs in 13 of 169 pairs. Band two contains scores 1 and 2 and occurs in 106 pairs. Band three contains scores 3 and 4 and occurs in 50 pairs. These are bands of attainable scores, not equal-probability bets. Exactly one band contains the final score.

One Captured Stake and Final Settlement

Starting deducts one captured stake and locks the ticket, stake settings and restoration. The first reading is incomplete and pays nothing. After the second reading, a matching ticket returns the captured stake multiplied by 0.96 divided by its exact hit probability, including the stake in that gross credit. A miss returns zero. There is no intermediate collection or extra charge. The exact gross multipliers are 162.24/13, 162.24/106 and 162.24/50, approximately 12.480000×, 1.530566× and 3.244800×.

Virtual Wallet and Restoration

A new local wallet starts with 1000 virtual coins. Stakes are 10, 20, 50 or 100, initially 20. One round deducts one captured stake. Settings and restoration lock during the two reveals. While idle below 10 coins, restoration sets the wallet to exactly 1000, rather than adding 1000. Saved fractional payout carry remains. The counters have no cash value, prize or withdrawal route.

The settled wallet, including a zero balance, and fractional payout carry persist in this browser’s localStorage. Reloading ends an unfinished round without refund or continuation. A different browser, device or cleared site storage can have different saved counters. Clearing cached files alone may leave localStorage intact. The local wallet is not an operator account or synchronised financial balance.

Expected Return and Different Hit Rates

Each ticket has exact unrounded expected RTP of 96%: its hit probability multiplied by its gross return multiplier is 0.96. This is an expectation across captured stakes, not a promised result for a session or a win frequency. The bands have different hit probabilities. Following past readings, changing stakes or switching tickets between rounds does not raise the expected return.

Frequently asked questions

Is this an official operator site?

9JJ is a search label, not an operator identity established by this guide. 9jj.info is an independent information guide with its own Bit Gap Roulette demo. No company, licence, official account domain, commercial game catalogue, payment service, app publisher or support contact is verified here. Search position, a similar name and page appearance cannot establish those facts.

How is the score calculated?

Bit Gap Roulette draws two independent uniform pocket readings from 0 through 12, giving 169 equally likely ordered pairs. Express each reading with four binary bits. The score is the Hamming distance: the number of positions whose bits differ. For readings 0 (0000) and 1 (0001), the score is 1. For readings 3 (0011) and 12 (1100), all four bits differ and the score is 4. The rule belongs only to this original demo.

Which scores does each ticket contain?

Before starting, choose one of three score-band tickets. Band one contains score 0 and occurs in 13 of 169 pairs. Band two contains scores 1 and 2 and occurs in 106 pairs. Band three contains scores 3 and 4 and occurs in 50 pairs. These are bands of attainable scores, not equal-probability bets. Exactly one band contains the final score.

When is a round paid?

Starting deducts one captured stake and locks the ticket, stake settings and restoration. The first reading is incomplete and pays nothing. After the second reading, a matching ticket returns the captured stake multiplied by 0.96 divided by its exact hit probability, including the stake in that gross credit. A miss returns zero. There is no intermediate collection or extra charge. The exact gross multipliers are 162.24/13, 162.24/106 and 162.24/50, approximately 12.480000×, 1.530566× and 3.244800×.

Does 96% promise a session result?

Each ticket has exact unrounded expected RTP of 96%: its hit probability multiplied by its gross return multiplier is 0.96. This is an expectation across captured stakes, not a promised result for a session or a win frequency. The bands have different hit probabilities. Following past readings, changing stakes or switching tickets between rounds does not raise the expected return.

Read the Bit Gap Roulette rules and virtual-wallet boundaries.