Home Play Links News Contacts
En Bg
Bulls and Cows

Bulls and Cows, known also as Cows and Bulls or Pigs and Bulls is an old code-breaking paper and pencil game for two players, similar to Mastermind.

It is a game with numbers that may date back a century or more. It is played by two opponents. The game can also be played with 3 digits instead of 4.

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. If the "first" player finds the number, the "second" has one more move to make and if he also succeeds, the result is even.

The secret numbers for Bulls and cows are usually 4-digit-numbers, but the game can be played with 3 to 6 digit numbers (with 5 and 6 digit numbers it is more difficult than with 4).

The game may also be played by two teams of 2-3 players. The players of every team discuss before making their move, much like in chess.

Because the game has simple rules, while it is difficult and entertaining, there are many computer variants; it is often included in telephones and PDAs.

Why did I make a new computer variant?
I got the text above from Wikipedia. Yes it's true that there are many computer variants, but in all of them there is only one player who tries to guess the number generated by the computer. In my online variant there are two players, you and the computer. You will try to guess the computer's secret number and the computer will try to guess your secret number. Enjoy!
Play Now
Link partners
Free Online Games Uncle Stink's Fun Games The Virtual Games Swf-Games Hangout Arcade Shooting Games Fishing Games
CNN News
 CNN.com - RSS Channel  
 Greek police arrest 1985 TWA aircraft hijacking suspect
Posted: Sunday, September 22, 2019
Greek police say they have arrested a 65-year-old Lebanese man on the island of Mykonos over the hijacking of TWA Flight 847 in 1985 in which a US Navy officer was killed.
 Save big on your fall wardrobe during Eileen Fisher's Fall Event
Posted: Sunday, September 22, 2019
CNN Underscored partnered with Eileen Fisher to create this content. When you make a purchase, CNN receives revenue. CNN news staff is not involved in the selections or product reviews. For more on what we do and how we do it, visit our About Us page.
 Donald Trump's sparkly trio of loyalists
Posted: Sunday, September 22, 2019
Commentators this week focused on a trio of Trump loyalists -- Sean Spicer who was twirling in a lime-green ruffled shirt, Corey Lewandowski who was tangling with and frustrating the House Judiciary Committee's Democrats and Rudy Giuliani who was a key figure in the whistleblower controversy
 Remember J.Lo's iconic dress from the 2000 Grammy's? She just wore an updated version
Posted: Sunday, September 22, 2019
You remember it. It was 2000, and Jennifer Lopez wore that plunging, green jungle-inspired Versace dress to the Grammy Awards. She just wore an updated version of it.
 Beijing Daxing International Airport: China's new mega-airport ready to open
Posted: Sunday, September 22, 2019
China is poised to open a new mega-airport to the south of Beijing ahead of the 70th anniversary of the People's Republic. Find out what Beijing Daxing International Airport is all about.
 England begins World Cup campaign with battling victory against Tonga
Posted: Sunday, September 22, 2019
England began its 2019 Rugby World Cup campaign with a hard-fought win over Tonga to fire a warning to the tournament's other top teams.
 FDNY responds to fire in New York City's Times Square
Posted: Sunday, September 22, 2019
The New York City Fire Department is responding to an "all-hands" fire near Times Square in New York City, the FDNY said.
 3 people are dead and 4 others are hospitalized in Pittsburgh. All were wearing orange wrist bands
Posted: Sunday, September 22, 2019
All seven people were wearing orange paper wrist bands, Pittsburgh Director of Public Safety Wendell Hissrich said.
 Some have started vape stockpiling in the US as a federal ban looms
Posted: Sunday, September 22, 2019
The great "vapocalypse" has begun and the horsemen leading the charge are from New York and Michigan.
 Cities across the world flash the Bat Signal on Batman Day
Posted: Sunday, September 22, 2019
Cities across the world on Saturday marked Batman Day by flashing the Bat Signal across buildings and into the night sky, a nod to the Caped Crusader on his 80th birthday.
 Trump heads to the UN focused on Iran and his political base
Posted: Sunday, September 22, 2019
President Donald Trump and his senior officials head to the United Nations' annual gathering of world leaders this week focused on a narrow agenda that reflects domestic political concerns, the foreign policy challenge posed by Iran and -- by design or default -- a continued disconnect with many traditional US allies on the issue of climate change.
 CNN's latest Iowa poll: Live analysis
Posted: Sunday, September 22, 2019
CNN and The Des Moines Register have released their fourth Iowa poll gauging where presidential candidates stand. Follow here for live analysis.
 Tropical Storm Karen forms east of the Windward Islands
Posted: Sunday, September 22, 2019
Tropical Storm Karen formed just east of the Windward Islands and has sustained winds of 40 mph. A tropical storm warning has been issued for Trinidad and Tobago, along with Grenada and its dependencies.
 Why we won't be cheering Modi and Trump in Houston
Posted: Sunday, September 22, 2019
Deep in the heart of Texas, not all of us are thrilled to see Modi and Trump in our backyard, write Swati Narayan and Manpreet K. Singh. Both leaders have stoked divisions within their respective countries, and enacted troubling policies that chip away at democracy
 'Star Trek: Deep Space Nine' actor Aron Eisenberg dies at age 50
Posted: Sunday, September 22, 2019
"The beauty that he was and the legacy he leaves behind is beyond words," Eisenberg's widow wrote.
 Trump to share stage with two world leaders in pair of battleground events
Posted: Sunday, September 22, 2019
President Donald Trump will join a pair of foreign leaders for events in Texas and Ohio on Sunday before heading to New York for a week of meetings with world leaders at the United Nations General Assembly.
 A dissenting voice emerges at the Federal Reserve
Posted: Sunday, September 22, 2019
Happy Sunday. A version of this story first appeared in CNN Business' Before the Bell newsletter. Not a subscriber? You can sign up right here.
 Many union workers really love their health benefits. That's a problem for Bernie Sanders.
Posted: Sunday, September 22, 2019
Health care benefits are really important to many union workers -- important enough to give up pay raises or even to walk off the job to keep the coverage they've negotiated.
 It's Banned Books Week. Here are the 11 most challenged books last year
Posted: Sunday, September 22, 2019
In 2018, at least 347 challenges were filed seeking to remove 483 books from libraries or schools, according to a recent news release from the American Library Association
 Harry, Meghan and Archie set to woo Africa on first royal tour as a family
Posted: Sunday, September 22, 2019
Britain's Duke and Duchess of Sussex and their baby son Archie kick off their first tour as a family on Monday in southern Africa.
 Police search for a suspect after 6 people are shot in downtown Indianapolis
Posted: Sunday, September 22, 2019
Police are searching for a shooter who left six people wounded in downtown Indianapolis on Saturday night.
 Three Catholic churches in El Paso targeted in arson attacks, the FBI says
Posted: Sunday, September 22, 2019
Three Catholic churches in El Paso have been targeted in arson attacks and investigators are offering a reward for information on the culprits.
 Thom Yorke calls himself a 'hypocrite' when it comes to climate change
Posted: Sunday, September 22, 2019
Radiohead singer Thom Yorke has called himself a "hypocrite" and admitted that his campaigning on climate change has often been at odds with his jet-setting lifestyle.
 An autistic student needed a quiet place to work. His desk was put in a bathroom stall
Posted: Sunday, September 22, 2019
A school district in Washington state is facing criticism for putting an autistic student's desk in a bathroom stall after his mother said he needed a "quiet place" to do his best work.
 Trump-Modi bromance reignited at Texas rally
Posted: Sunday, September 22, 2019
"Howdy, Modi!" is billed to be the largest gathering for an any foreign leader visiting the US. It's the type of hyperbole you can imagine Trump appreciating.
 Ukraine's comedian-turned-politician walks a fine line with America's reality-TV President
Posted: Sunday, September 22, 2019
Ukrainian President Volodymyr Zelensky does not have an easy job. Ukraine is one of the poorest places in Europe, his country faces a steady outflow of capital and a proxy war with Russian-backed insurgents has settled into a bloody stalemate.
 Sure, black people can be racist, too
Posted: Sunday, September 22, 2019
Scholar Ibram X. Kendi, whose provocative new book is titled, "How to be an Antiracist," says the notion that black people can't be racist is tainted by racism itself.
 Connecticut reports its first death from Eastern equine encephalitis in years as the outbreak grows
Posted: Sunday, September 22, 2019
A Connecticut resident infected with Eastern equine encephalitis has died in the state's first fatality from the disease since 2013, health officials said.
 In this crippled part of the Bahamas, US medics can smell more bodies than they can find
Posted: Sunday, September 22, 2019
It takes just seconds here to be overwhelmed by the stench of death.
 Growing up intersex in a country where it is believed to be bad luck
Posted: Saturday, September 21, 2019
Babalwa Mtshawu never experienced puberty. She didn't get her period or grow breasts like the other girls around her. After years of trying to figure out why she was different, she finally booked an appointment with the doctor.