iterami/Docs.htm/common HTM Repos/chess.js/chess_check_rank(args)
  - Checks if there are any pieces in a rank between loopstart and loopend.
  
 - Returns true if pieces are found, or else returns false.
  
 - Can optionally accept a specific board as an array of strings, or else will just use the board from the game id.
 
  
    | board
     | void 0
     | array of strings
   | 
    | id
     | 
     | string
   | 
    | loopend
     | 
     | number 0-7
   | 
    | loopstart
     | 
     | number 0-7
   | 
    | rank
     | 
     | number 0-7
 |