Every number on this site comes from code that runs in your browser, so every number can be audited. These are the standing validation runs; when the engine changes, they run again.
{{ c.desc }}
{{ c.result }}
The engine does not model surrender yet, so charts for surrender rule sets are incomplete and say so on the page. Simulator results carry normal shuffle variance: a 100,000-hand run lands within a fraction of a standard error of the exact math, and the readout shows both numbers so the gap is visible, not hidden.