The Chess Symbols block spans U+1FA00–U+1FA6F, 112 codepoints in Plane 1 (Supplementary Multilingual Plane). 98 are assigned in Unicode 16.0; the other 14 are reserved for future characters.
All of its characters have the script value Common: they are shared across writing systems rather than tied to one.
By general category: 98 other symbols (So).
The first 14 arrived in Unicode 11.0 (2018); later additions came in 12.0 (84).
Because it lies outside the BMP, every character here takes four bytes in UTF-8 and a surrogate pair in UTF-16.