After finalizing the design, we began by working on modeling the most crucial component: the chessboard, as it serves as the foundation for dimensioning other parts, such as the rail, gripper, and pieces.

According to our design constraints, the spherical chessboard has a diameter of 20 cm.

For inspiration, as mentioned in our first log, we looked at Orb Chess by NKD Puzzle :

We first began modeling the spherical chessboard :

For ease of manufacturing, since the chessboard will be 3D printed, we designed it to be assembled from two identical half-domes. Since the sphere will be mounted on a threaded rod, it can be securely fastened with nuts on both sides to form the sphere when put together.

Additionally, each square of the chessboard will be inserted into designated holes on the dome, completing the playable surface.

The squares features holes on the inside for inserting magnets, allowing the pieces to stay securely attached while still being easily movable.

Here is the fully assembled spherical chessboard with all components in place, the two half-domes, and inserted chess squares.