OSTINATO - A chess library that runs on the server (Scala), on the browser (ScalaJS) and on the REPL

OSTINATO is a chess library that runs on the server (Scala), on the browser (ScalaJS) and on the REPL. It supports the following Chess notations (with variants): PGN, Algebraic, Figurine, Coordinate, Descriptive, ICCF, Smith and FEN.