How does an online casino determine the outcome of a card game like blackjack or baccarat compared to a slot machine?

Behind most questions like this one is a real concern: can I trust that the game is fair? It's a completely reasonable thing to wonder, and the honest answer is that the mechanisms are well-understood — and meaningfully different between card games and slots. Here's how it actually works.

Slots: Pure RNG, Every Spin Independent

The Random Number Generator (RNG) is a computer chip inside every slot machine that makes thousands of mathematical calculations per second. It never stops. The RNG constantly randomizes numbers even when the machine is not in use. The moment you hit Spin, the RNG freezes on a random set of numbers that determine the corresponding symbols on the reels — and the outcome is determined the second you hit that button. The animation you watch after that? The spinning symbols just add entertainment to the game. The result was already decided.

One important consequence: there are no strategies to beat a slot machine, because the RNG ensures every win is random. Each spin is completely independent from the last, and all previous, spins. Past results carry no information about future ones — none whatsoever.

RNG Card Games: Same Engine, Different Logic

When you play a digital (non-live) version of blackjack or baccarat at an Ontario-registered online casino, the RNG is still driving the outcome — but it's doing something structurally different from slots. Rather than mapping a number to a reel symbol, a random number generated by the RNG corresponds to a card for a baccarat game (or blackjack hand). The software simulates a shuffled deck: each number the RNG produces maps to a specific card in a specific position, and the dealing sequence follows from there.

The critical distinction from slots is that card games have memory within a hand. Blackjack cards are removed after play, so the composition of the deck changes — and so do the odds. In a multi-deck digital blackjack game, the RNG effectively "reshuffles" between rounds, but within a hand, the cards dealt earlier constrain what can appear next, just as in a physical shoe. Blackjack is a game of chance, but a player's skill and decisions can affect the outcome — something that simply isn't true of slots, where no decision you make changes the odds of any spin.

Live Dealer: No RNG at All

The third format available on regulated Ontario platforms is live dealer — and here the RNG exits the picture entirely. A real human dealer, filmed in a studio, physically shuffles and deals from a real shoe of cards. The outcome comes from the physical world: card positions in the shoe, the dealer's shuffle, the cut. Your device receives a live video stream; the cards you see are the cards that were dealt. This is why many players find live dealer games more intuitive to trust — the randomness source is visible and familiar.

What Fairness Oversight Actually Looks Like in Ontario

For players in Ontario's regulated market, the question of fairness isn't just theoretical. Operators must be registered with the AGCO and operate under iGaming Ontario, which became an operationally independent agency in 2025. The RNG software used by registered operators is subject to independent technical testing — third-party labs certify that the generators produce genuinely unpredictable outputs and that game math matches what operators publish. You can confirm you're on a legitimate, regulated site by looking for both the iGaming Ontario logo and the BetGuard logo, which all fully approved Ontario operators display.

None of this changes the fundamental nature of the games: most regulated forms of gambling involve randomness — the numbers generated by a computer, the card being drawn, wheels being spun — all involve some form of randomness. Simply put, all forms of gambling have an unpredictable result. Understanding the mechanism is genuinely useful, but it doesn't create an edge. If gambling ever stops feeling like entertainment, ConnexOntario (1-866-531-2600) is available around the clock.