When having a Luft is not enough
From Wikipedia - "Luft, the German word for "air" (sometimes also "space" or "breath"), is used by some chess writers and commentators to denote a space left by a pawn move into which a castled king may move, especially such a space made with the intention of avoiding a back rank checkmate."
In this article, you will see an interesting pattern of how a R and a N are able to generate a solid pressure on the back rank, in spite of the K having a Luft.
See the article here.
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