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original mathematical recreations. If you have a math puzzle, discovery, or observation, please e-mail me about it. You can also send answers to the problem of the month. |

Math Magic Archive |

This month we consider a variant of this game which we call "Knight Life", which uses the same growth rules, but in which the 8 neighbors of a cell are the places a knight could move in chess.

What life forms are stable ("still life")? What life forms repeat themselves with a period larger than 1? What periods are possible? Are there life forms that maintain the same shape but move ("gliders")? Are there life forms that grow without bound? What is the life form that starts inside a square of side s that lasts the longest without dying or repeating?

You can see all the best known results here.

Submit your answers here.

Weekly Puzzle Sites: | | Ken Duisenberg | NPR | Puzzability | The Griddle | Puzzle Picnic | Nick's | |

Other Puzzle Sites: | | MathPuzzle.com | IBM | Retrograde Analysis | Puzzle Palace | Terry Stickels | |

Interactive Puzzle Sites: | | Click Mazes | Puzzle Beast | Logic Mazes | Color Shift | Grid 1 | 2 | Boomshine | |

Physics-Based Puzzle Sites: | |
Perfect Balance 1 |
2 |
Assembler 1 |
2 |
3 |
4 | | Color Infection | Redstar Fall 1 | 2 | Fantastic Contraption | |

Colleges with Puzzles: | | Macalester | Missouri State | Purdue | |

Great Math Sites: | | Geometry Junkyard |
Math World |
Mathematician Biographies |
| Integer Sequences | Inverse Calculator | Geometric Dissections | |

Recreational Math Sites: | | Mike Keith |
Harvey Heinz |
Primes |
GIMPS |
| Polyforms | World of Numbers | Soup Kitchen | |