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Understanding Nim

There are many internet resources that will tell you how to win at Nim, but at NRICH we found them all to be rather unsatifactory. Sometimes it's not enough to know the secret of winning - and the curious amongst us want to know why it works and how it was discovered. With those thoughts in mind, we've developed an animation called 'Drips' that we hope will allow you to discover the secret for yourself. It's still not totally straightforward so be prepared to dwell on the problem for some time. You will find the animation at https://nrich.maths.org/drips. It's tablet and phone friendly.

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