Question 1

What is the objective of Nim?

Accepted Answer

Take the last object(s) to win (normal play), or avoid taking the last object (misere variant).

Question 2

How do you set up Nim?

Accepted Answer

Objects (traditionally matchsticks or stones) are arranged in several piles. Classic setup: rows of 1, 3, 5, and 7 objects (16 total). Many variations exist with different starting configurations.

Question 3

How do you win at Nim?

Accepted Answer

Win by taking the last object (normal) or forcing your opponent to take it (misere). The winning strategy involves binary XOR calculations of pile sizes.

Question 4

What are the basic rules of Nim?

Accepted Answer

Players alternate turns. On your turn, remove any number of objects from a single pile (at least one, up to all of them). You can only take from one pile per turn.

Question 5

What are some strategy tips for Nim?

Accepted Answer

Learn the Nim-sum: XOR all pile sizes in binary. If Nim-sum is 0 before your move, you're in a losing position (with perfect opponent play). Always aim to leave a Nim-sum of 0 after your move. With two equal piles, mirror your opponent's moves in the other pile.

Question 6

What is the history of Nim?

Accepted Answer

Nim was comprehensively analyzed by Charles Bouton in 1901, who proved the winning strategy. The name may come from German 'nimm' (take) or archaic English 'nim' (steal).

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