Now comes the Tournament of the Hedgehogs no. 3

The Hedgehog says: "Have a look what I am doing before the winter comes. I go and seek for a warm and safety place for to sleep a long time until it gets warmer again."
Now look at the chessbord and do something very similar. Go into the pit and close yourself in.

This is the link for the tournament: https://www.chess.com/tournament/now-comes-the-tournament-of-the-hedegehogs-no-3