I want to be able to build and use different pieces. Make a chessboard and it comes without pieces, then you craft it with various things to get pieces

a = material-type
b = chessboard

aaa
aba
aaa

pawns

axx
xbx
xxa

bishops

xax
xbx
xxa

knights

xax
xba
xxx

rooks

xax
xbx
xxx

queen

xxx
xbx
xax

king

If you mix the 6 resulting items together, you get a piece bag (if compatible). Right-clicking on a board with the piece-bag adds/swaps the sets. The piece-bags are classed as either white or black pieces.

Make some pieces unmakeable, found as loot in the world/rare trades, you still form piece-bags with them.

Make a display case for storing and showing your piece sets.