Cows and bulls description

1.Game description:
Aim of user is to find the target word set by the computer by guessing. Each guess will be responded by number of cows and bulls.
If an alphabet in your guess is present in the target but not in the current position then you get a cow.
If the position also matches exactly you get a bull.

2.Game rules:
There are three difficulty levels/word length (3,4 and 5).
For word length ,
3 --> no of guesses allowed is 10
4 --> 15
5 --> 20
Only dictionary words are allowed. Alphabets cannot repeat in target or guess.

3.Implementation:
Main process is,

• get word from user
• validate
• display number of cows and bulls

Validation involves,

checking for character repetition, checking for correct length and checking if the word exists in dictionary.

I load dictionary into my application using AJAX request and then use it rest of the time.