To load the NIM construal and its associated 'playsheet', invoke JS-EDEN, as at

http://jseden.dcs.warwick.ac.uk/scifest

and select Nim Coins from the Project List.

The construal supplies a simple interface for playing NIM with three piles of stones, each containing up to 15 stones. It also incorporates a visualisation to support the winning strategy and buttons for expert and novice play. A variant of NIM to be played with coins is proposed and is partially supported by the current version of the construal.

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