Every game begins with a unique shuffle generated from the system’s cryptographic random source. The same game number always produces the same deal, which is how Daily Challenges give every player the same shuffle and how Restart This Game replays the same card order.
Real Solitaire Deluxe uses a high-quality pseudorandom number generator (the L’Ecuyer algorithm with a Bays-Durham shuffle table) with a period exceeding 2 × 1018. Each card in the deck is placed at a random position, producing a fair and uniform shuffle.
If you have ever been dealt several bad hands in a row and wondered whether the shuffle is really random, you are not alone. This is a well-known psychological effect called the clustering illusion: our brains are wired to spot patterns, even in data that is completely random. When you see three Kings bunched together or a long streak of losses, it feels deliberate, but it is exactly what randomness looks like.
Psychologists Daniel Kahneman and Amos Tversky showed that people expect random sequences to look more evenly spread out than they actually are. In reality, true randomness naturally produces streaks, clusters, and runs that feel suspicious.
Real Solitaire Deluxe uses a mathematically rigorous shuffle that treats every possible card arrangement as equally likely. Some of those arrangements will be easy to win, and some will be nearly impossible. That variance is not a flaw — it is the nature of randomness.