Abstract: A puzzle includes a plurality of pieces having the same outer shape, the plurality of pieces are divisionally arranged in a plurality of layers, and the pieces assigned to each of the plurality of layers are selectively arranged at locations on a plane of the layer. Each of the plurality of pieces includes an opaque part, and at least one of the plurality of pieces further includes a transparent part. The opaque parts of pieces assigned to a given layer are formed to cover, of true patterns and dummy patterns on a lower side of the layer, the dummy patterns, and the true patterns seen through the transparent parts of the pieces are combined to form one pattern.