Nim and variations
Can you take the last counter?
Last Biscuit (NRICH)
Experiment with different starting numbers of biscuits?
Can you find a strategy so that you always win?
From Jefferson Lab (Thomas Jefferson National Accelerator Facility – Office of Science Education) this game of Nim allows you to play a friend or the computer. If you choose the computer to play against you can choose whether the computer should be an expert, somewhat distracted or mostly clueless!