Knights on a Board

Write a function that returns true if the knights are placed on a chessboard such that no knight can capture another knight. Here, 0s represent empty squares and 1s represent knights.

Examples

cannotCapture([
  [0, 0, 0, 1, 0, 0, 0, 0],
  [0, 0, 0, 0, 0, 0, 0, 0],
  [0, 1, 0, 0, 0, 1, 0, 0],
  [0, 0, 0, 0, 1, 0, 1, 0],
  [0, 1, 0, 0, 0, 1, 0, 0],
  [0, 0, 0, 0, 0, 0, 0, 0],
  [0, 1, 0, 0, 0, 0, 0, 1],
  [0, 0, 0, 0, 1, 0, 0, 0]
]) ➞ true

cannotCapture([
  [1, 0, 1, 0, 1, 0, 1, 0],
  [0, 1, 0, 1, 0, 1, 0, 1],
  [0, 0, 0, 0, 1, 0, 1, 0],
  [0, 0, 1, 0, 0, 1, 0, 1],
  [1, 0, 0, 0, 1, 0, 1, 0],
  [0, 0, 0, 0, 0, 1, 0, 1],
  [1, 0, 0, 0, 1, 0, 1, 0],
  [0, 0, 0, 1, 0, 1, 0, 1]
]) ➞ false

Notes

• Knights can be present in any of the 64 squares.
• No other pieces except knights exist.