The program so far, such as it is, can be played here.
It is at the stage I had reached when I decided to start writing these explanatory pages, with the aim of helping others. I plan to keep this version available, linked as above.
I will keep the A versions of files and make new copies with suffix B from now on.
Next we need to be able to drag cards or subcolumns to our required position, if allowed by Spider rules, rather than automatically jumping to an allowed spot.
However, I first want to revisit a couple of things, in the next pages...