Answer:

nim

AnswerCrossword Clue
NIMLogic game with matchsticks
NIMMath-based game
NIMGame of logic
NIMAncient game much studied in game theory
NIMGame with matchsticks
NIMSubtraction game
NIMMatchsticks game
NIMGame with sticks
NIMTakeaway game
NIMTakeaway game with matches
NIMGame played with counters
NIMPick-up-sticks game
NIMMatch game
NIMMath game