The mark consists of blocks of numbers, one number per block with the first row across consisting of the numbers "613 985 247" the second row across consisting of the numbers "458 172 369" the third row across consisting of the numbers "972 634 851" the fourth row across consisting of the numbers "861 359 724" the fifth row across consisting of the numbers "534 728 916" the sixth row across consisting of the numbers "297 416 583" the seventh row across consisting of the numbers "745 863 192" the eighth row across consisting of the numbers "189 247 635" the ninth row across consisting of the numbers "326 591 478." The numbers are in black with gray lines defining each block. A black line outlines each square of nine blocks. In the first row of squares the number "3" block is shaded in gray. In the second square to the right the number "7" block is shaded in gray. In the second row of squares the number "5" block is shaded in gray. In the third square in that same row the number "9" block is shaded in gray. In the third row of squares in the middle or second square the number "8" block is shaded in gray. In the next square over the number "1" block is shaded in gray. Each column of squares is surrounded by an arch. The arch on the left is red and outlined in black. The middle arch is green and outlined in black and the arch on the right is blue and outlined in black. Below that is the wording "MYSTERY SUDOKU" in black. To the right are two columns. The first column is shaded and gray and consists of the numbers "123456789" in black, one above the next. The column to the right consists of black letters underlined in black, one above the next, "MYSSUDOKU".