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Nim: instructions and practice

A small practice goal

Compare the worked example with your own position. Use the reasoning, not an answer copied from a different board. Use the example to check your reasoning.

Your goal

Remove the last counter on the board to win. Keep that objective in view throughout the round. The example below illustrates a decision.

A walkthrough of the rules

  1. Player 1 chooses a pile.
  2. Remove at least one counter, and up to all counters, from that pile.
  3. The next player chooses a pile and an amount.
  4. Continue until no counters remain.

Choosing and moving on screen

Use the on-screen controls with a mouse or touch. On a smaller screen, keep the active part of the board within view. Use the visible help when you are unsure of the next input.

Try this example

If only one counter remains in one heap, taking it wins under the normal-play rule used here. Apply the same reasoning to the position in your own round. Keep the game’s format in mind.

Check this before moving on

Only one pile may be changed per turn. Check the rule before repeating the action. Read one step at a time and try it on the playing area. Match the instruction to the control you use.

More answers before you play

For my first round, what is the goal of Nim?

Here is the relevant explanation: Remove the last counter on the board to win.

How do I control Nim?

Here is the relevant explanation: Use the on-screen controls with a mouse or touch.

While learning, what example helps explain Nim?

Here is the relevant explanation: With piles of 1 and 2, a move may empty one pile, but cannot remove one counter from both in the same turn.

What should I watch out for in Nim?

Here is the relevant explanation: Only one pile may be changed per turn.

Before I begin, what format does Nim offer?

Here is the relevant explanation: Play using the same-device two players mode shown on this page. Read the controls before starting a new round.

While reading the Guide, which play mode does Nim use?

For clarity: The mode on this page is Same-device two players. Same-device play uses one screen; this game library does not provide internet matchmaking.

Before I begin, where should I start with Nim?

Keep this in mind: Player 1 chooses a pile.

As a new player, do I need an account or a payment for Nim?

The key detail is this: No player account or payment is needed. Game scores are recreational results, not cash prizes.

As a new player, how can I find Nim again?

The key detail is this: Use the Games list or save this game page in your browser bookmarks. The Guide is linked from the playing page.

While reading the Guide, how do I report an issue with Nim?

The key detail is this: Use the contact form and include the game name, browser, device and the actions that led to the issue. Do not send passwords or payment details.