yi4
ancient name for go (Chinese board game)

strokes 9
radical
strokes after radical 6
博弈 博弈 bo2 yi4
games (such as chess, dice etc); gambling; contest

博弈论 博弈論 bo2 yi4 lun4
game theory

对弈 對弈 dui4 yi4
to play go, chess etc

零和博弈 零和博弈 ling2 he2 bo2 yi4
zero-sum game (economics)