Catch21 Online Card Game - Did You Know?

Blackjack is the name of a casino game which originated in French casinos during the 18th century, where it was called "vingt-et-un" ("twenty-and-one"). The name "blackjack" came from an archaic rule of the game that paid a player an extra amount if he got a Jack of Spades and an Ace of Spades as his first two cards.

Blackjack is also the nickname for a crystalline mineral called sphalerite, or zinc blende, which is composed mainly of zinc sulfide.

A blackjack is a type of hand weapon, consisting of a piece of leather-sheathed metal with a strap for a handle.

Blackjack is the name of a Russian strategic bomber, developed in the 1980's, and similar to the American B-1 bomber.

Blackjack is the name of a scrubby oak found in the southwestern U.S.

Finally, a blackjack is a type of beer tankard, usually made of tar-coated leather.

Catch21 Card Game Rules

Online Card Game Catch21

Speed through the deck, making as many 21's as you can!

Imagine blackjack as a skill-based solitaire game, and you've got a pretty good idea of Catch-21! Speed through the deck and use the four columns to create as many 21's as you can. The two black jacks can be played at any time to clear a column!

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Game Goals


Maximize your score by making 21's as fast as you can.

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Game Rules


Move the top card from the draw pile to one of the four columns. The number over the draw pile shows the number of cards remaining in the draw pile.


You can move a card to any column provided that the resulting total of cards in the column is 21 or less. A casino chip is displayed atop each column where it is possible to place the current card. The number at the top of each column shows the current total of the cards in that column. Picture cards (Jacks, Queens, and Kings) have a value of 10; Aces can be either 1 or 11.


When the total of the cards in a column equals 21, the cards in the column are cleared. You can also clear a column with a "Five Card Charlie" by placing five cards in the column, even if they total less than 21 points.


The two Black Jacks (the Jack of Spades and the Jack of Clubs) are special cards. Playing one on any column will clear that column, no matter what the total. As a reminder, when a Black Jack appears, the words "Blackjack Attack" will flash.


If you have no column on which you can play the next card, you must discard it. For strategic reasons, you may also want to discard a card even if there is a legal place to play it.


The clock begins at five minutes and counts down. You will receive a time bonus based on the amount of time left on the clock at the end of the game. If the clock reaches 0:00 before you have played your last card, the game ends immediately.

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Game Controls


Click any of the four columns to move the current card to that column. Or click the discard pile to discard the current card.


You can also use your keyboard to play. Type "1" through "4" to select a column, or type "D" to discard.

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Game Scoring


You'll get 50 points for each column cleared by a "21", 75 points for each column cleared by a Blackjack Attack, and 100 points for each column cleared by a Five Card Charlie. (If a column is cleared two ways at the same time, the higher point value applies. For example, if you put a Black Jack on a column, and it's the fifth card in the column, you'll get 100 points for the Five Card Charlie, not 75 points for the Blackjack Attack.)


At the end of the game, you'll receive a time bonus:

(1000 * Time Remaining)

Time Limit


Example: littledebbie cleared 9 columns with 21's, 2 columns with Blackjack Attacks, and 1 column with a Five Card Charlie. She had 2:45 seconds remaining on the clock.

Her score:

(9 * 50) + (2 * 75) + (1 * 100) +  

(1000 * 165)

   =   1250


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Game Strategy


Even though there is no point penalty for discards, try to avoid discarding because it means that you will end up making fewer column-clearing moves.


Always create a 21 when you have the chance to. Keeping as many open columns as possible reduces your chance of having to discard.


The closer a pile gets to 21, the fewer the cards that can be played there. If all your piles are close to 21, you run the risk of having to discard several cards in a row.

Remember that 16 of the 52 cards have a value of 10 (about 30% of all the cards) so try to create columns with 11 in them, which will combine with any 10 to form a 21.


Group your low cards together, if you don't need them, to form Five Card Charlies, which give you the most points for a column-clearing. But don't go out of your way to make Five Card Charlies, or you'll deplete your supply of low cards that you need to clear those columns with 17, 18, or 19 points.

There are only 4 aces; try to keep track of how many you've seen so far.

Similarly, try to remember how many of the two Black Jacks are still left.


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