One side holds the "x" block, while the other side holds the "O" block. Both sides decide who will play chess first through stone scissors and cloth. Both sides take turns putting the blocks into a grid and connecting them into a row of three pieces (horizontal, vertical, diagonal). The one who agrees wins Notes: 1.Please allow 1-3cm error due to manual measurement. Please make sure you do not mind before bidding. 2.Due to the difference between the different displays, the picture may not reflect the actual color of the item.