Check if Two Chessboard Squares Have the Same Color

export function checkTwoChessboards(coordinate1: string, coordinate2: string): boolean {
  return getCoordinateColor(coordinate1) === getCoordinateColor(coordinate2);
}
 
function getCoordinateColor(coordinate: string): 'black' | 'white' {
  const col = coordinate.charCodeAt(0) - 'a'.charCodeAt(0);
  const row = parseInt(coordinate[1]) - 1;
  return (col + row) % 2 === 0 ? 'black' : 'white';
}