Each one allows extensive customisation via a simple graphical interface, so you can make them as easy or as hard as you like - to suit every age and skill level. For your convenience, you can download a zip file containing trial versions of all six games for your evaluation. If you prefer, just visit their individual pages on this site, to see full details and screenshots, or download trial versions individually. To buy the six-game compendium, come back to this web page, and hit the purchase link at the top right. Clear the board by making rectangles of one colour from the multi-coloured shapes.
Rectangles disappear, along with any adjoining squares of the same colour.
Still, the unique deduction puzzle based on the movement of chess pieces has maintained a steady interest among puzzle fans. The only rule is that the edge colours must match.