Answer

Here is an instruction on how to fix the crack on the board.
1. Apply strong adhesive or glue (for wood craft) between the cracks.
2. Both sides of the board should be pressed using a jack strongly after placing wood protection on both sides.
3.Leave it for about 10 hours.
4.After 10 hours, release the jack gradually.
5.The cracks will be strongly bonded together.

Caution:
Please keep the Go board away from heat source or stove.
Sudden temperature change and too dry atmosphere is not good for Go board.