const pawnShift = (color == "w" ? -1 : 1);
Array.prototype.push.apply(pawnSpec.attack[0].steps,
[[-pawnShift, 1], [-pawnShift, -1]]);
const pawnShift = (color == "w" ? -1 : 1);
Array.prototype.push.apply(pawnSpec.attack[0].steps,
[[-pawnShift, 1], [-pawnShift, -1]]);