Black's king on c7 has been checked by the White pawn on d6. The White pawn on d6 is protected by White's Knight on e4. However, White's Knight on e4 is pinned to the White King on e1, by the Black Rook on e8. Question is, can the King still capture the d6 pawn even though the Knight technically is not protecting the d6 pawn because of the pin?
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Black's king on c7 has been checked by the White pawn on d6. The White pawn on d6 is protected by White's Knight on e4. However, White's Knight on e4 is pinned to the White King on e1, by the Black Rook on e8. Question is, can the King still capture the d6 pawn even though the Knight technically is not protecting the d6 pawn because of the pin?
No.
If White can't put his own King in check, then why should Black be allowed to do so?
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