Shortest way to make a checkerboard pattern

I’m looking for the shortest (in terms of characters) code snippet to make an n-square checkerboard. Here’s my first try (comes in at 72 characters):

Graphics@{PatternFilling["Checkerboard", ImageScaled[1/10]], 
  Rectangle[]}

And my second try, which is a bit shorter (42 characters):

Image @ Table[.5 + (-1)^(i + j)/2, {i, 10}, {j, 10}]

Image@Array[(-1)^+## &, {8, 8}]

=chess board