It is just that there appears no link to it on the Jocly overview page. Or from the Gigachess article. So you can only play it here by selecting something that does work (e.g. Courier Chess), and then using Jocly's own "other Jocly games" link to select GigaChess.
Thanks. But I think what we have here is the same thing:
/http://chessvariants.com/play/jocly/examples/browser/control.html?game=giga-chess
It is just that there appears no link to it on the Jocly overview page. Or from the Gigachess article. So you can only play it here by selecting something that does work (e.g. Courier Chess), and then using Jocly's own "other Jocly games" link to select GigaChess.