
| Problems for Practice Problems for Practice. Problems for Practice how will you work it out? The cardboard that Sam Loyd used for his puzzle cards was specially selected by him. He wanted to ensure that it had the right balance of texture and thickness, to not only enhance his graphics, but to also give you the best in-hand embellishment when holding the card to solve it. The Sam Loyd Company has been able to recreate that same cardboard, as- Problems for Practice. |