How to play?
Like in the standard game of Cows and Bulls, the aim here is to guess the value of your opponent. How - Write your guesses in the field on the left and hit Enter.
What is different - When sure that a certain digit is a cow, type it in the Cows's field on the right and hit Enter.
In case you are sure of a bull, type it on its corresponding position in the bulls' fields on the right and hit Enter.
By correct guesses, you will be granted points (more for bulls and less for cows). However, if your guess is not correct, points would be taken.
The earlier you make a right cow/bull guess or manage to guess the whole value, the more points would be granted.
Hint: When you are sure of a bull, mark the digit as a cow as well - that way you would take both the cow and bull points for the digit.