UniLecs - Задача 140

task140.js

const isHorseMove = str => {

  if(!/^[A-H][1-8]-[A-H][1-8]$/.test(str)) throw new Error('wrong incoming data');
  
  // (c1, r1) - start coodinate, (c2, r2) - coordinate after move a figure
  const [c1, r1, _, c2, r2] = str.split('').map(ch => ch.charCodeAt(0));

  return (
    (Math.abs(c1 - c2) === 1 && Math.abs(r1 - r2) === 2)
      ||
    (Math.abs(c1 - c2) === 2 && Math.abs(r1 - r2) === 1)
  )
};


console.assert(isHorseMove('B1-C3') === true);
console.assert(isHorseMove('D4-C2') === true); 
console.assert(isHorseMove('D4-B3') === true); 
console.assert(isHorseMove('D4-B5') === true); 
console.assert(isHorseMove('H1-G3') === true); 
console.assert(isHorseMove('H1-F2') === true); 
console.assert(isHorseMove('E2-E4') === false);
console.assert(isHorseMove('C2-C8') === false);