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H. G. Muller wrote on Tue, Nov 21, 2023 03:45 PM UTC in reply to Bob Greenwade from 03:19 PM:

I was not aware of it, but I understand why it gave trouble: the | is also a character that in the eyes of the shell terminates the command. I changed the fen2.php script now to also escape that with a backslash.

This still doesn't make it usable in an ID, however, as there is no trick similar to the -- to derive the color of the second piece from the first. This could be implemented in fen2.cgi, of course. But the result of the | is often quite ugly; perhaps it wasn't such a good idea to have it at all.

Another problem for use in the ID is that a rotation specifier before a combined piece does not act on the second piece. But it seems unlikely that anyone would ever want to rotate combined pieces.

If you refer to your diagram a few comments earlier in this thread, I don't think the s=50 could have been the culprit. For one, this would be a legal request, (even though it is also default). And it did work when I added it to my Diagram below. This morning the board of your Diagram was completely empty. But after I created mine, I suddenly noticed that the pieces were also displayed in yours. So I think browser caching has been fooling us here, and that the only thing the removing of s=50 did was bypass the browser cache, which still must have contained corrupted images from before we fixed the ampersand problem.


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