Giant Puzzle by Creative Crafthouse

The "Giant Puzzle" was first introduced in 1888 by McLoughlin Bros of New York. We found a picture of the old puzzle in Slocum and Botermans book, "New Book of Puzzles" (1992) and were fascinated by it. It has a bit of a Sudoku edge to it, and it’s really hard. We kept the original name: "The Giant Puzzle" but it’s not giant sized, measuring about 5.5" x 5.5" x 1.25". Ergonomically it’s terrific to handle. It has 25 pieces in the base. Each piece is different. There of 5 pieces of each color. The the numbers 1,3,5,7,and 9 are also printed on the handles of each color. (thus there will be a blue-1, blue-3, blue-5, blue-7, blue-9, and then likewise for each color). The handles are a nice feature of this puzzle which we added from the original design which just had flat blocks which we found very awkward to get in and out of the puzzle. The object is to arrange all the pieces in the base such that there is no color repeated on any row, column, or any diagonal. Also, no number can be repea