This puzzle is a copy produced by puzzle design Ton Delsing. Slid the numbers into order. Start: remove orange center piece & piece number ten. Green pieces are immovable.Material MDF.
12 pieces with inlaid letters. Pieces with tongue and groove.Slide from the starting position ALBWHITE CK!!ET TO !WHITE !BLACK! On the back there is a slide up and down. This slide changes the free hole.Then slide to BLACK! WHITE! easy?Material Acrylic.
