Kata 16 - Queen Threat Detector

kata16QueenThreatDetector.js

let wQ = [0, 5];
let bQ = [5, 0];

let board = [
  [0, 0, 0, 0, 0, 0, 0, 0],
  [0, 0, 0, 0, 0, 0, 0, 0],
  [0, 0, 0, 0, 0, 0, 0, 0],
  [0, 0, 0, 0, 0, 0, 0, 0],
  [0, 0, 0, 0, 0, 0, 0, 0],
  [0, 0, 0, 0, 0, 0, 0, 0],
  [0, 0, 0, 0, 0, 0, 0, 0],
  [0, 0, 0, 0, 0, 0, 0, 0],
]

function generateBoard(wQ, bQ) {
  board[wQ[0]].splice([wQ[1]], 1, 1);
  board[bQ[0]].splice([bQ[1]], 1, 1);
  return board.join('\n');
}
// I'm not a mathematician so...  citing formula for threat from as
// If qR = oR, it means that both the queen and the opponent are in the same row and the queen can attack the opponent.
// Similarly, if qC = oC then also the queen can attack the opponent as they both are in the same column.
// And for diagonals, if abs(qR – oR) = abs(qC – oC) i.e. queen can attack the opponent diagonally.
// https://www.geeksforgeeks.org/check-if-a-queen-can-attack-a-given-cell-on-chessboard/

function queenThreat() {
  let threat = false;
  if (Math.abs(wQ[0] - bQ[0]) === (Math.abs(wQ[1] - bQ[1]))) threat = true;
  if (wQ[0] === bQ[0] || wQ[1] === bQ[1]) threat = true;
  return threat; 
}

let generatedBoard = generateBoard(wQ, bQ);

console.log(generatedBoard);
console.log(queenThreat(generatedBoard));