8 Services from chess-notation.x402tookit.com

Returns file, rank, color, index, diagonals, mirror squares, and positional flags for a given chess square like e4.

Renders a FEN position string as an 8x8 ASCII chess board (White at bottom) plus a piece-by-square inventory list.

Computes material balance from a FEN string using standard piece values (1-3-3-5-9), returning point totals for each side, their difference, and per-piece counts.

Parses PGN tag pairs, validates the Seven Tag Roster, checks result token and date format, and counts moves in the movetext.

Returns all squares a given chess piece can reach from a specified starting square on an empty board, along with the count of reachable squares.

Computes the minimum number of moves between two chess squares for king, rook, bishop, and knight pieces on an empty board.

Classifies a chess time control (bullet, blitz, rapid, or classical) from base minutes and optional increment, and returns estimated game length.

Validates a chess FEN string by checking syntax of all six fields, king and pawn counts, castling rights, en passant consistency, and piece totals.