NO jQuery/javascript.

Following on from the previous dartboard, this version uses just an unordered list of 20 items with no HTML numbers or CSS text for numbering.

Instead, this uses counter(item) to apply a number to each of the list items.
This number is then styled to look like the numbers on the previous dartboard.

So this is a dartboard using an HTML empty unordered list and is probably as far as this can be taken - FOR NOW.
But who knows what CSS styles will be available in the next 10 years.