Description of Deducrion online puzzle program at Mac Shareware: Click on one of the five spaces to change the color of the rock in it. You can choose from five colors. When you press done, you get a white rock for every rock in the right place, and a black rock for every rock that is the right color, but in the w

Deduction free logic puzzle. Click on one of the five spaces to change the color of the rock in it. You can choose from five colors. When you press done, you get a white rock for every rock in the right place, and a black rock for every rock that is the right color, but in the wrong space. Use this information to make another guess. See whether you can guess the combination in 10 or fewer turns.

Deducrion online puzzle is a completely free software. You can free download and use it as long as you like.