Answer
The answer is as follows. 
Katrielle and the Millionaires' Conspiracy walkthrough
The princess has been snatched by the evil king again.
The knight and his beloved horse are on their way to the castle to rescue her, but the horse is getting low on energy.
The horse moves like a knight in chess (in the shape of an L).
You can jump over anything that is in the way, but you cannot land in squares with trees or poisonnous lakes.
Use this information to find a way for the horse to eat all four carrots before arriving at the vil king's castle.
The answer is as follows.