Three shapes for the same idea.
The touch ring keeps a familiar centre and a defined circular navigation area. The touch disc opens the whole surface to a glide, with a subtle visual reference in the middle. The hybrid option combines a touch-sensitive area with a distinct centre that could become a physical confirmation button. These are alternatives to compare, rather than three promised products.
A selection you can follow.
Movement should be easy to read on the board. A highlighted square tells you where you are; a separate selected state tells you which piece you chose. We want confirmation to be deliberate, so browsing the board does not accidentally become a move. Sensitivity, accidental touches, left- and right-handed use, and comfort all need testing on actual hardware.
Try the rhythm before the hardware.
The landing page interaction study lets you switch between these designs. Swipe the circular surface or use arrow keys to navigate. Tap or press Enter to select e2, move up twice to e4 and confirm to try the sample pawn move. It illustrates an input flow, not a complete chess game. Surface texture, physical click and tactile feedback cannot be demonstrated by this browser study.