Set class instead of color style.
One forbidden styling for debug.
Style SVG stroke in CSS.
Convert cell id to coord before playing.
Convert before playStone.
No need to set screen top on game loading.
Add timeout for resize event.
This avoid huge style calculation and paint operations.
Remove setGobanSize callback.
Get parent only for nodes > 0.
Remove useless z-index.
Isolate global classes.
Remove duplicate.