During a kyudo round in a sports fest, an archer shoots 4 arrows, but does so 2 at a time. When keeping score, a circle indicates success, and a cross or a line indicates a miss. As expected of Japan, there is a space-saving efficient way to keep score that uses 2 spaces instead of 4 using these symbols…
∅ This one means that the first arrow missed, and the second arrow hit.
⍉ This one means that the first arrow hit, and the second arrow missed.
☓ This one means that both arrows missed.
◎ This one means that both arrows hit.