 But the first player ("A") makes a "sacrifice" at move 7 and B accepts the sacrifice, getting one box.However, B "must" now add another line, and so B connects the center dot to the center-right dot, causing the remaining unscored boxes to be joined together in a "chain" (shown at the end of move 8).With A's next move, A gets all three of them and ends the game, winning 3–1.