Chess Beyond Limit

Floating in a strange, infinite void is a CHESSBOARD. Upon it are 32 pieces, 16 white and 16 black, arranged in standard formation. No moves have been made.

This is not a normal game of chess. There are no rules determining how a piece may move, nor what one may be capable of. There are only two rules to follow here.

1) Sides take turns in alternating order.
2) The game is over when one side manages to execute the other's KING.

Other rules may be added as the game progresses.

What shall the first move on this board be?