White Bishop to d8 takes "free" Queen
Black Knight to f2 takes Pawn, two-prong on Queen and Rook
White Queen to d2
Black Knight to h1 takes Rook
White Pawn to d4, threatens Bishop
White has taken Queen 9 points, only lost Rook 5 points: 4 points lead. Futhermore Black Knight cannot flee as g1 is not protected by the Bishop.
If I'm not missing anything (which I probably do), while not "free" seems like a good exchange for me.
Black Knight to f2 takes Pawn, two-prong on Queen and Rook
White Queen to d2
Black Knight to h1 takes Rook
White Pawn to d4, threatens Bishop
White has taken Queen 9 points, only lost Rook 5 points: 4 points lead. Futhermore Black Knight cannot flee as g1 is not protected by the Bishop.
If I'm not missing anything (which I probably do), while not "free" seems like a good exchange for me.