Change Change (1969)

Change Change was published in A Gamut of Games. In this solitaire game, the player takes eleven coins: four from each of two different denominations, two from a third denomination, and one unique. They are arranged randomly in a 3x4 layout, with an empty space in the bottom-right. The player aims to transform the layout into one that is symmetrical around the horizontal axis by sliding the coins (like a slide puzzle), counting each slide as a 'move'. The usual target is to complete 7 rounds in less than 100 moves.