Spider Solitaire.

How to play

Stack cards downward in any suit. A run in a single suit moves together, and a complete run from king to ace leaves the table.

Deal a new row from the stock whenever you are ready, as long as no column is empty. Start with one suit and work up to four.

Press ? for keyboard shortcuts. The rules run on our own C code, compiled to WebAssembly; the same module powers the browser and the command line. Matching the original program is a separate job, and it is tracked in the open.