From left-to-right, top-to-bottom, four chessboards with FEN notation 8/8/2n3b1/8/4K1r1/2n5/3n4/3b2q1 w - - 0 1, 8/8/1bb2n2/8/1r1K2n1/8/1n1b4/8 w - - 0 1, 2q5/2b5/6r1/2n1K3/2b5/5n2/8/8 w - - 0 1, 8/4b3/1n6/3K1bn1/8/3n1b2/5q2/8 w - - 0 1.
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