Two dice, three coins, and three cards share the screen in this probability playground. Start with 1,000 imaginary credits, choose outcomes and amounts, and watch a sequence of rounds unfold. The balance chart and round reveal show what happened after each play.
Follow the rules, then the results
The dice and coins are fair and independent. Cards are drawn without replacement from a new 52-card deck each round; the tool explains its card values and payout rules. Displayed chances are calculated from those rules, and a higher chance of winning a wager does not necessarily mean a favorable payout.
This is a rebuilt version of the 2025 project. It runs entirely in the browser once loaded, with imaginary credits and no account. Session records are saved only in that browser's local storage; they are not an online leaderboard.
Open Probability Parlay in its own page for the full workspace.
