Explanation
⯽ is Unicode character U+2BFD. U+2BFD is its code point, the stable number Unicode uses to identify that character. Its standardized name is PASSED SYMBOL, and its documented chess use is to mark a passed pawn. Older systems may instead show ⚨ , which Scid uses with the same meaning. A pawn is passed when, in the direction it moves, no opposing pawn remains ahead on its own file or either neighboring file.
⯽: passed but not isolated
The three-file test
The white pawn on has no black pawns ahead on the c, d, or e-files. The friendly pawn on occupies a neighboring file, so the pawn on is not isolated.
The mark identifies a positional feature, not a complete evaluation. A passed pawn can be dangerous because it may reach the last rank and promote, meaning it becomes a queen, rook, bishop, or knight. Even so, an opposing piece may stop it by standing in front, capture it, or force it to depend on support. The symbol does not say how far advanced the pawn is or whether the game is winning.
⯽: passed but contained
The rook occupies the advance square
The white pawn on has no black pawns ahead on the c, d, or e-files, but the black rook on blocks its advance and attacks it. Being passed does not guarantee promotion.
The modern glyph and its historical alternative can look different across fonts. A font without the character may display an empty box even though the underlying text is valid.
Common confusions
Passed pawn versus isolated pawn
An has no friendly pawn on an adjacent file. A passed pawn is defined by the opposing pawns ahead. One pawn can be both, either one, or neither.
Sources
- 1.Miscellaneous Symbols and Arrows, Unicode Consortium
- 2.NAG Values, Scid vs. PC
- 3.Passed Pawn - Chess Term, Chess.com
