【實用解謎app】Bulls And Cows Puzzle|最夯免費app-綠色工廠好玩App

Bulls and Cows (also known as Cows and Bulls or Pigs and Bulls) is an old code-breaking paper and pencil game for two players. It is played by two opponents. On a sheet of paper, the players each write a 4-digit secret number. The digits must be all different. Then, in turn, the players try to guess their opponent's number who gives the number of matches. If the matching digits are on their right positions, they are bulls, if on different positions, they are cows.

Example:

Secret number: 4271

Opponent's try: 1234

Answer: 1 bull and 2 cows

The bull is 2, the cows are 4 and 1.

The first one to reveal the other's secret number wins the game. As the first one to try has a logical advantage, on every game the first player changes. In some places, the winner of the previous game will play second. Sometimes, if the first player finds the number, the second has one more move to make and if he also succeeds, the result is even.