A simple workaround can be to design/import the designs of the chess pieces in a CAD software such as solidworks/Fusion 360 and export the STL files as URDF. You can follow the given link to convert stl files to URDF format here:
https://answers.ros.org/question/36589/converting-solidworks-stl-files-into-urdf-file/
A simple workaround can be to design/import the designs of the chess pieces in a CAD software such as solidworks/Fusion 360 and export the STL files as URDF. You can follow the given link to convert stl files to URDF format here:
https://answers.ros.org/question/36589/converting-solidworks-stl-files-into-urdf-file/