A card is dealt from the deck, and any player that has the picture of that card on their board puts a bean on it. The pattern to win (a column or a row) is determined at the beginning of each round. Once one player makes that pattern, they shout Loteria" (hit the Loteria button on Google's version) and win the game.
Loteria Nacional has excellent winning odds that outshine many of the world's biggest lotteries: more than 1 in 3 tickets will win a prize! The odds of the winning the first prize are 1:100,000, and there are 37, 151 ways to ways to win in every raffle draw!