There are varied tastes among puzzle lovers. Some prefer puzzles, others have an inordinate passion for sudoku, and others swear by chess problems. Taking into account, in this section, satisfying everyone, I think I have found the perfect enigma.
With the pieces below, form a 4×4 chess board, so that each row and column contains exactly one rook, one knight, one bishop, and one member of the royal family. Once this is done, White plays and mates in a single move.
To form the square you can rotate and flip the pieces. The orientation of the chess pieces in the squares does not matter.
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