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Swap the white and the black figures.
wap the black and white knights in the fewest moves
Swap the white and the black figures.
Swap the white and the black figures.
You Win!
Reminding a polar igloo, or snow hut, hence the title's aspiration*, the board to this chess problem has quite a bit of free cells. Once you see some key moves, you'll crack the entire solution. Utilize as many multi-leap knight moves as possible. Seven moves is rather achievable than unreachable in this challenge.
A tiny initial hint here is that 4 out of the 6 pieces possess the same and only opening move for all of them. This can be a very interesting prompt into foreseeing couple of steps ahead.
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*This chess problem first appeared in 'The Big, Big, Big Book of Brainteasers' by the Grabarchuk Family in 2011, published by Puzzle Wright Press, part of Sterling Publishing