①

Circled digit 1.

①

1. (astronomy, no fill) The asteroid 1 Ceres.

   Synonym: ⚳

2. (go) The first (white or black) stone played in a position.

• As of 2022, Unicode provides characters for circled numbers from ⓪ to ㊿. These were not adopted with minor planets in mind. Even before computers, it was common to simplify the typesetting of minor-planet symbols by replacing e.g. "①" with "(1)". When the number is combined with the name, e.g. "(1) Ceres", the formatting is often further abbreviated to "1. Ceres" or "1 Ceres". Given that as of 2022 there were over 600,000 numbered minor planets, it would be impractical for each to have a Unicode character. Similarly, Unicode provides negative (reversed-color) characters from ⓿ to ⓴. ① and ❶ can be used in Go game notation to mark the first placed white and black stones. However, since game notation can extend past 200, and Unicode support does not extend past ⓴ for black stones and ㊿ for white stones, Unicode support is adequate for short positional plays but not for full game illustrations.

• ⓪