A semi-doughnut gauge shows one simple value, as a percent of the whole, using a simplified half doughnut chart and one main color (the other neutral color is a pale gray). Semi Doughnut Gauge charts have no tooltips and no legend. Interactivity is also automatically disabled (even when you try to turn it ON): you cannot slice, select slices or get a hover effect on mouse movements. Main challenge was to display the unique data value (as quantity or percent, when Data Labels is ON) in semi doughnut's half hole. And we did this with a custom styled HTML text, for all featured applications. Also, as you can see, there is still a work in progress for the proper positioning of the semi-doughnut, for a few applications. Most chart apps do not have the half doughnut built-in, and we had to emulate it.