Game Rules

Version 2.1In force since 2026-09-29

How the free games on the Jogo do Bicho site work: FUN chips with no value, how a play is recorded, how the result of the jogo do bicho and of the casino games is determined, what RTP means, how to check a result and what happens when something fails.

1. This version and why it replaces the previous one

This is version 2.1 of the Game Rules of the Jogo do Bicho site (jogodobicho.com), in force since 29 September 2026. It replaces version 2.0, of the same date, which in turn fully replaced version 1.0, dated 5 August 2026.

Version 1.0 described a real-money operation under an authorisation from the Secretariat of Prizes and Betting of the Brazilian Ministry of Finance (SPA). That operation does not exist: the site holds no such authorisation and runs only on FUN chips, which are free and have no value. This version describes what the site is and does today.

Medida Provisória (Provisional Measure) nº 1.394 of 25 September 2026 prohibits in Brazil the operation, offer, intermediation and advertising of fixed-odds betting lotteries, including on virtual events of online games. This revision was made in that context, so that the rules describe accurately how the site works.

Version 2.1 only changes names that the screen uses: a play made with chips is now called a BetFUN, and the profile tab with pending plays, “Upcoming BetsFUN” (sections 2 and 7); the kind of play, which the screen calls “BetFUN type”, is named that way in sections 5, 8 and 10. No game rule has changed.

These rules supplement the Terms of Use and the Responsible Gaming document. Any change of content produces a new version; its number and effective date are shown at the top of this page. The site publishes only the version in force.

Legal basis: Lei 8.078/1990 (Consumer Protection Code), art. 6º, III (adequate and clear information about the service)

2. What the site is, and what it is not

The Jogo do Bicho site offers free entertainment games. The games that use chips use FUN chips: virtual chips with no economic value, which exist only inside the site.

No game on the site accepts money. There are no deposits, no withdrawals and no prizes of value: what you win in a game is more FUN chips, equally without value. The site neither offers nor accepts bets in money or in any other thing of value, nor does it receive or pass on such bets for third parties.

FUN chips are credited free of charge by the site itself: when a guest session is opened, at registration and through the free top-up. They are not sold or bought, cannot be transferred to another person and cannot be exchanged for money, goods, services or anything else.

The screens use the term BetFUN and traditional game words such as wagered, prize, won, pays and buy a card. On the site, those words refer only to plays and results in FUN chips with no value.

Advertising: outside Brazil, the home page may show affiliate advertisements for international lotteries operated by third parties, which lead to third-party sites. Visitors from Brazil, or from a country the site cannot identify, are not shown those advertisements. In every country, Brazil included, the home page also shows the “Partners” section, with links to other sites, lottery sites among them.

3. Definitions

In these rules, the terms below have the meaning given.

4. Who can play

The site is intended exclusively for people aged 18 or over.

You do not need an account to play: anyone who plays without being signed in automatically receives a guest session with starting FUN chips. The guest session does not ask for a name, email address or date of birth.

At registration, age is declared through the date of birth and checked on the server, which refuses anyone who is not yet 18. There is no document-based verification. A registered account must confirm its email address to play the instant draw of the jogo do bicho.

In the games that use chips (jogo do bicho and casino), the server refuses plays from an account that is closed, that has an active break or self-exclusion, or that has reached one of its gaming limits. The restrictions apply to the account: a guest session, which is not linked to any account, does not inherit them. The social tables, which use no chips, do not make these checks. Breaks, self-exclusion and limits are described in the Responsible Gaming document.

5. How a play is recorded

The result of every game is decided on the server, never in the browser. A play exists only once the server records it: filling in the screen, tapping the button or watching an animation is not enough.

The debit of the chips and the recording of the play happen in the same server operation: either both happen, or neither does. In the instant draw of the jogo do bicho, the draw and the credit of the chips won are part of that same operation.

In the jogo do bicho, each line is recorded with its BetFUN type, selection, chips and the multiplier applied. The recorded multiplier is the one that applies to that line, even if the table changes later. The chips credited for a winning line are the line’s chips multiplied by that multiplier, rounded down to the hundredth of a chip.

6. Jogo do bicho: the 25 groups and how to read a result

The jogo do bicho distributes the 100 two-digit endings (dezenas), from 00 to 99, into 25 groups of 4. Each group has a number, from 1 to 25, and an animal. The correspondence is fixed.

Each position of a draw is a four-digit number, from 0000 to 9999, called the milhar. From it one reads the centena (the last 3 digits), the dezena (the last 2 digits) and the group, which is obtained from the dezena: divide the dezena by 4 and round up; dezena 00 belongs to group 25.

Example: the milhar 7503 has centena 503, dezena 03 and group 1 (Ostrich), because 3 divided by 4, rounded up, is 1.

7. Jogo do bicho: instant draw and scheduled draws

The jogo do bicho screen has two modes, which follow different paths on the server.

“Now” (instant draw): when the ticket is confirmed, the server immediately draws the 5 milhares with a cryptographic random generator, settles the lines and credits the chips won. Each instant draw applies only to the ticket that triggered it and can be checked with the method in section 11.

“Pick a draw” (scheduled draws): the ticket is saved in one or more draws at the times shown on the screen, in Brasília time. These draws do not use a random generator: they are settled with the result of the Rio de Janeiro jogo do bicho for the same time, obtained automatically from public sources on the internet, without independent verification. The first 5 positions of the published result are used; the group of each position is the one the source publishes with the milhar or, if it does not publish one, the one obtained with the rule in section 6. The server stores with the draw a copy of what the source published, with the capture time and the SHA-256 fingerprint of the content.

When a time slot on the screen groups more than one draw (shown by the number in brackets), the ticket is recorded in each of them and the chips are debited once per draw; the screen shows the total before confirmation. The ticket is saved in all the chosen draws or in none.

Scheduled draws accept plays until their set time, by the server clock. Until that time, a pending play can be cancelled in the “Upcoming BetsFUN” tab of the profile, with a full refund of the chips. After that time there is no cancellation, because the result may become public before it is processed here.

Until the result is published and captured, the plays remain pending. If it cannot be obtained, the draw is cancelled and all pending plays are refunded in full, in chips: after 24 hours, when there is evidence that the result will not come (the time slot is not on the Rio calendar, or the source has already published a later Rio result), and in any case after 7 days.

8. Jogo do bicho: BetFUN types and multipliers

Simple — bicho, tens, hundreds and thousands: a line wins when its chosen value matches the group, the dezena, the centena or the milhar of a position. “Head only”, the line competes for a single position: in a scheduled draw, the 1st; in an instant draw, the position with the same number as the line on the ticket (the 1st line competes for the 1st position, the 2nd line for the 2nd, and so on). “All five (5)”, the line competes for all 5 positions, and the multiplier is the head-only multiplier divided by 5.

Double and triple — of bicho or of tens: a line wins when its 2 or 3 values, all different, appear among the 5 positions of the same draw, in any position and in any order. These BetFUN types always compete for all 5 positions.

Combined — “Hundred Combined” and “Thousand Combined”, also known as inverted: a line wins when its digits come out in any order, in any of the 5 positions. The multiplier is the head-only multiplier for hundreds or thousands divided by the number of distinct orderings of the chosen digits times 5, rounded down to a whole number. Repeated digits produce fewer orderings and therefore a higher multiplier: 123 has 6 orderings; 553 has 3.

A winning line is credited only once, even if the chosen value appears in more than one position.

The table in force is the one the server reports and the game screen shows on each button before the play; if the table cannot be read, the screen shows no multipliers. The values below are the system defaults. They can be changed, and a change applies only to future plays: each line keeps the multiplier recorded when it was registered (section 5).

9. Casino games and social tables

The site’s casino games are roulette, mines, black jack, video poker, slots (in the bicho and classic versions), wheel, scratch and bingo.

The result of each round is determined on the server by a cryptographic random generator fed by a 32-byte seed generated for that round and stored with it. Each round is independent of the previous ones: the game keeps no memory of losses in order to make up for them, and a run of losses does not mean a win is near.

In mines, black jack and video poker a round has more than one step. A round left open is closed by the server, with a refund of chips, when the player starts another round of the same game or, automatically, after 30 minutes counted from its start. The chips played are refunded; in black jack, everything placed on the hand; in mines, the greater of the chips played and the value accumulated up to that point.

The social tables — backgammon, generala and truco — are turn-based games against another person or against the computer. They use no chips: nothing is debited or credited. The rules of each table are chosen by whoever creates it, from the options the game offers, and are shown before a person sits down. Dice and cards are drawn on the server with a cryptographic generator, and the computer plays by the same rules as a person.

10. RTP: theoretical return

RTP is the percentage of the chips played that a game returns in chips, on average, over a very large number of plays. An RTP of 95% means that, in the long run, the game returns about 95 chips for every 100 chips played.

RTP is not a promise about your session: in the short run, the result can be far above or far below it. And, since chips have no value, RTP describes chips, not money.

The RTP of each casino game appears on the game’s page, read from the configuration in force on the server. If the server does not respond, the page shows no figure at all rather than an unconfirmed one. In black jack and video poker, the RTP shown assumes the player’s best decisions (basic strategy, in black jack); other decisions return less.

In the jogo do bicho, the screen shows the multiplier of each BetFUN type rather than an RTP, because each BetFUN type has its own. The theoretical RTP of each BetFUN type, calculated by the server from the table in force, is published at jogodobicho.com/api/games/rtp.

Changes to RTP and multipliers made in the configuration are accepted only within ranges fixed in the system’s code, and apply only to subsequent plays.

11. How to check a result

Results generated by the RNG can be checked by anyone, without an account, at public addresses on the site, once the round has ended. Before that the seed is not revealed, because it would allow the result to be calculated.

The jogo do bicho calculation can be redone with any SHA-256 implementation. For each position i, from 1 to 5, compute the SHA-256 of the text formed by the seed (64 hexadecimal characters), a colon and the number i — for example, “seed:1” — and read the first 8 hexadecimal digits of the result as a number.

Algorithm sha256-v2, used by current draws: if that number is lower than 4,294,960,000, the milhar is the remainder of its division by 10,000. If it is not, repeat the calculation with “seed:i:1”, then “seed:i:2”, and so on, until a number below that limit is obtained. Discarding values gives every milhar exactly the same chance. Algorithm sha256-v1, used by the oldest draws: the milhar is always the remainder of the division by 10,000, with no discarding. Each draw records its algorithm, and the check uses that one.

What the check proves: that the recorded result is exactly what the stored seed produces and that it was not altered afterwards. What it does not prove: the seed is neither published nor committed to before the round, so the check, on its own, does not prove that the seed was chosen before the play.

At present the screens do not show in full the draw or round identifier needed for the query. The server returns it in the response to each play, and it can be requested through the channels in section 13.

Scheduled draws have no seed: the result comes from the public source described in section 7, and the check address reports that no seed is stored.

12. Failures, cancellations and refunds

If a failure prevents the server from completing a play, the play is not recorded — there is no debit, no draw and no credit — and the balance stays as it was.

If the server completed an instant draw or a casino round, the result stands even if the screen froze or the connection dropped: the chips won have already been credited. In scheduled draws, the chips won are credited when the draw is settled with the published result (section 7).

Where what the screen showed differs from what the server recorded, the server’s record prevails.

Refunds and corrections are always made in FUN chips: the site does not handle money.

13. Questions and complaints

Questions and complaints about a play can be sent through the form on the Contact page, at jogodobicho.com/en/contacto, or by email, to contacto@jogodobicho.com or to the address published on that same page. Please give the date and time, the game and, if you have it, the draw or round identifier, so that the play can be located in the record.

For an instant draw or a casino round, the reference is the seed (section 11); for a scheduled draw, it is the copy of the source stored with the draw (section 7).

Nothing in these rules limits the rights the law grants to people who use the site, including the right to turn to consumer protection bodies.

Legal basis: Lei 8.078/1990 (Consumer Protection Code), art. 6º, VII (access to judicial and administrative bodies)

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