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Bingo Rules

Chance is everything in Bingo: each player is given pre-printed matrices – of 5x5 or 5x9 – and then need to match their given numbers to a set of numbers drawn at random. All matrices are represented electronically, but we call them “cards”.

Bingo rooms are represented in all major crypto-currencies. Players can purchase a maximum of 36 tickets each round. A new game of bingo takes place every few minutes, so you need never miss a game again!

90-Ball Bingo
For a game of 90-Ball Bingo, tickets feature a grid of 27 squares: split into three rows and nine columns. Every row features five numbers and four blank squares, and so a total of 15 numbers appear on each ticket.

There are three prizes to be won in each bingo game, consisting of one line, two lines and three lines.

75-Ball Bingo
Tickets for 75-Ball Bingo feature 25 individual squares, with five rows and five columns – within each square is a number, for a total of 25 numbers on every ticket. The center square, however, is empty and contains a star icon.

There are five prizes to be won in each bingo game, consisting of one line, two lines, three lines, four lines and five lines.

Jack’s Weekly Draw F.A.Q

How do I get a ticket for JWD?
You cannot buy a ticket for Jack’s Weekly Draw game -- you have to earn it. On every 40 tickets you buy in any Bingo room, on any currency, we reward you with 1 JWD ticket.

What happens if I received the JWD ticket but cannot attend the game?
Whether you attend the game or not, your tickets will still be considered in a JWD draw. After you earn at least 1 ticket, you can enter the room and choose ticket numbers yourself. Otherwise, tickets will be filled by random numbers.

How do you draw a winning from the JWD Prize Pool?
There are three prizes to be won in JWD, consisting of one line, two lines and three lines (a Full House).
The Prize Pool is distributed as follows:

What if several players draw a line at the same time?
Line Prize Pools will be divided equally to all winning players.

Provably Fair
FotuneJack is the first crypto-currency gambling website offering Provably Fair Bingo. This is how the seeds are generated:
At the start of each game, a player receives hash, which is:
SHA256 (SECRET);
Where
SECRET is SERVER_SEED;INITIAL_STATE
SERVER_SEED is a random number, which is used for generating the final ball draw, together with the numbers, chosen by the clients.
INITIAL_STATE Is the initial ball draw, which is also represented randomly.
In order to get final ball draw, clients send CLIENT_SEED to the server before the ball draw.
In order to get final result, players should use SERVER_SEED and CLIENT_SEED numbers as inputs for the Mersenne twister algorithm. Using this algorithm single random number is generated CUTOFF
0 <= CUTOFF < NUMBER_OF_BALLS
Using this number, we divide INITIAL_STATE into two parts. The first part is CUTOFF ball and the second part includes the rest of the balls. We switch the places of these two parts and combine them again.
The result is the final ball draw.
For example there are 5 balls.
INITIAL_STATE = 0205010304 (2, 5, 1, 3, 4)
SERVER_SEED = 17
CLIENT_SEED1 = 23
CLIENT_SEED2 = 4
mersenne_twister(17, 23, 4) --> 144. 144 mod 5 = 4
Parts: 02050103, 04
The final result will be: 0402050103 (4, 2, 5, 1, 3)
 

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