Challenge yourself with these brain teasers!

This is a collection of challenging puzzle games. Some are easier than others, but all can be difficult.

Nim (formerly The Rock Game)
Coin Swap
Dog's Crossing the River
Knight's Tour
Gentle Bishops

Nim has 3 different board sizes and the difficulty level of computer play can be adjusted. At any difficulty level, the computer will get smarter with every loss it takes. Challenge yourself to find patterns to win at the highest difficulty.

Knight's Tour has 4 different board sizes, 5x5 up to 8x8. The larger the board, the more possible outcomes and thus the more of a challenge.

What’s New

Version 1.1

Bug fixes

Ratings and Reviews

5.0 out of 5
1 Rating

1 Rating

App Privacy

The developer, Russell Thorman, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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