Physical Colorku boards (usually wooden with colored marbles) are beautiful but expensive and bulky. A offers several distinct advantages:
The puzzle cards act as the "starting grid" for the game. Each card displays a partially filled 9x9 grid, instructing you where to place specific colored marbles on the board to begin. colorku puzzle cards pdf
Educational and Gameplay Uses
This features five overlapping 9x9 grids. You must solve all five simultaneously. A of this type is massive (usually requiring A3 paper) and can take days to solve. colorku puzzle cards pdf