Attacking knights

Sep 20, 2010, 9:23 PM |

Do you like puzzles? Try your hand below.

A) What is the maximum number of Knights that can be placed on a chess board such that no two Knights attack each other? The answer might be easy to find, but can you prove it?

B) What if we relax the condition from A) and require that each Knight is either unattacked or it is attacked by exactly one Knight?