Leopard

An example diagram showing the layout of the card game Leopard.
Leopard is a card game for two players. Each player uses the cards in their hand to manipulate a pair of three-by-three tableaux by playing cards to them. The players try to form lines of cards of the same suit or the same color and prevent their opponent from doing so.

Leopard was created by Robert Abbott, who is best known for creating the more popular game Eleusis. It was published as part of Abbott’s 1963 book Abbott’s New Card Games. A proprietary version of the game, Sabotage, was produced in Germany in 1996.

Object of Leopard

The object of Leopard is to build the highest-scoring tableau. This is done by forming lines of three cards of the same color or the same suit. At the same time, players attempt to disrupt their opponent from doing the same thing.

Setup

Leopard uses a deck of 104 cards, formed by shuffling together two standard 52-card decks without jokers. While we’ve never tested Denexa 100% Plastic Playing Cards against a leopard attack, we’re fairly confident they’d do better than paper cards. You’ll also need something to keep score with, such as pencil and paper or a smartphone application.

Each player should be seated such that they have enough space between them to fit a three-by-three square of cards in front of them. This initially vacant area is the tableau. Each tableau consists of nine empty spaces corresponding to the ace in the upper left through the nine on the lower right. (See the image above.) Shuffle and deal eight cards to each player. Place the deck stub face down to the side, midway between the two players, forming the stock. The area immediately adjacent to the stock is reserved for the discard pile.

Game play

Game play begins with the non-dealer. Their turn begins by drawing one card from the stock. They may then either play one card to either of the tableaux. If they cannot or don’t wish to, they can simply discard a card to the discard pile. The turn then passes to the dealer. Cards in either the discard pile or either tableau cannot be returned to a player’s hand.

The value of each player’s tableau is determined by the combined total of each of the tableau’s lines. A line is a vertical column, horizontal row, or either of the diagonals (from upper left to lower right and from upper right to lower left). A line is worth three points if it contains three cards of the same suit. If it contains three cards of the same color but not the same suit, it is worth one point. All other lines are worth zero points.

Leopard scoring examples.

Most cards can be played either to your own tableau or to your opponent’s. Also, some cards may be played face down to the tableau. When a card is played face down on top of another card, it is treated as though that spot is vacant until another card is played on top of it.

Role of each card

Each card has a slightly different set of restrictions on where and how it can be played:

  • Aces through 9s can only be played in their designated spots in either tableau.
  • 10s can be played in any empty space on your own tableau.
  • Jacks are always played face down on top of another card. They may be played to either tableau.
  • Queens are always played face down, like jacks. However, they can only be played to your own tableau.
  • Kings are the most powerful cards in the game. They may be played on top of any card or in any blank space in your own tableau.

In some cases, it can be ambiguous which spot in the tableau a 10 or a king may be played to. A player may require their opponent to clarify which space a given card is intended to occupy, if necessary.

Going out

When the point value of your tableau reaches seven or more points on your turn, you may go out. You must go out before you have played or discarded any cards, i.e. right after drawing. Going out is entirely optional; you may choose to continue playing in order to increase your score. Unlike most games, the player that goes out is charged a one-point penalty for doing so, in order to provide an incentive to not go out immediately when able.

When the stock is depleted, play continues as usual, although players do not draw at the beginning of their turn. They must, however, still play a card or discard on each turn. If both players exhaust their hands before one of them goes out, the game is simply scored at that point, with neither player taking the penalty for going out.

Scoring

When the hand ends, both players calculate the final value of their tableau. To this, each player also adds one point for each point in excess of seven that their tableau was worth. For example, a player with an ending tableau worth 7 points would have a final score of 7. A tableau worth 8 points would score 8 + 1 = 9 points, a tableau worth 9 points would score 9 + 2 = 11 points, and so on. The player going deducts their one-point penalty from this total. These final scores are then recorded to the scoresheet.

The player with the highest total score at the end of four hands wins the game.

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Eleusis

Eleusis is a game with a simple premise—only the dealer knows which cards are acceptable to play and which are not, and the players have to determine what the rule of play is! But getting there is the fun of the game; players only have the history of previous cards played to go off of, and must deduce the rule of play from that knowledge.

Robert Abbott invented the game in 1956, and was the subject of a column by Martin Gardner in Scientific American in June 1959. Abbott began revising the game in 1973, adding the role of the prophet, and Gardner wrote about the game again in Scientific American‘s October 1977 issue. After the latter column, Eleusis started to be added to the game books. The game’s uniquely deductive game play has been noted as being a practical application of the scientific method in everyday life, and scientific papers have been written analyzing the thought processes of Eleusis players for this reason. A variant of the game, Eleusis Express, was even created to help provide educators a hands-on tool to illustrate the scientific method to students.

[Eleusis] should be of special interest to mathematicians and other scientists because of its striking analogy with scientific method and its exercise of precisely those psychological abilities in concept formation that seem to underlie the ‘hunches’ of creative thinkers.” —Martin Gardner, Scientific American, June 1959

Object of Eleusis

The object of Eleusis is different for the dealer than it is the players. The dealer’s goal is to create a rule of play that is difficult enough that the players cannot easily deduce it but easy enough that it is eventually solved. The players’ goal is to correctly deduce the rule of play.

Setup

Eleusis requires quite a few cards to be played right. Use two decks of Denexa 100% Plastic Playing Cards, shuffled together (not including jokers), to form the initial stock. You should also have a third and possibly fourth deck handy if necessary to replenish the stock.

Eleusis has quite a large layout, so a suitably large table will be necessary in order to play the game. If nothing else, you may be required to play on the floor (although this leaves the game vulnerable to roving toddlers and dogs if any are present).

Before dealing, the dealer comes up with a rule of play that will be followed throughout the hand and records it on a scrap of paper, keeping it concealed from the players. The rule must prescribe which cards are acceptable to play, determining this in terms of the previous cards played and cannot reference anything outside of the layout, such as the time or date, details about the players or the number of cards they hold, et cetera. Rules often, but not always, use something about the last card played as their basis, such as its color, suit, or number (if number is used, aces are normally treated as having a value of one, jacks equalling eleven, queens equalling twelve, and kings equalling thirteen). Some example rules are:

  • If the last card played was red, play a black card, and vice-versa.
  • Each card played must have a value of two less or two more than the last card played.
  • Two consecutive cards of the same color must be played, then three consecutive cards of the other color, and so on.
  • The cards must cycle through the suits in the order ♠♣♦♥.

Shuffle the deck and deal fourteen cards to each player, except for the dealer, who receives no cards and takes no active part in game play. Turn the top card of the deck face-up and place it at one edge of the play area; this card is the starter. The remainder of the deck becomes the stock.

Game play

The player on the dealer’s left plays first. They lay a card down, face-up, as a potential play. The dealer calls this card “Right” if it fits with the rule of play or “Wrong” if it does not. If the card is right, it is placed beside the starter, forming a horizontal line called the mainline. Otherwise, it is placed above or below the starter, forming a line of incorrect plays called a sideline, and the player who attempted the incorrect play is dealt two cards to add to their hand.

As players become more confident in their knowledge of the rule, they may set down multiple cards as their play, specifying the order they are to be played in. The dealer then declares this string to be “Right” or “Wrong” in its entirety. In the event of a wrong play, the dealer does not specify which or how many of the played cards caused the string to be incorrect. The cards are moved to the sideline as a unit, fanned together to show that they were played as a string and not as singleton plays, and the player is dealt twice the number of cards in the string as a penalty (e.g. for an incorrect five-card string, the player is dealt ten cards).

If a player believes they have no legal play, they may expose their hand and call “No play”. The dealer then examines their hand. If the player truly has no moves, the player’s hand is discarded to the bottom of the stock and they are dealt a new hand with four fewer cards than they had previously, unless the player only has four or fewer cards, in which case the hand ends immediately. If the dealer spots one or more cards that can be legally played, they move one of these cards to the mainline and receive a penalty of five cards from the stock.

The prophet

Once a player is certain they have discovered the rule of play, they may, after their turn but before the next player’s, declare themselves to be the prophet (or in some rules, the forecaster). There can only be one prophet at a time, and a player may not serve as prophet twice in one hand. There must also be two or more active players other than the prophet and the dealer in order to become the prophet. A marker of some kind (such as a chip, a coin, or a roulette dolly) is placed on the last card played whenever a player becomes a prophet. The prophet sets their hand aside (but does not discard it).

The prophet then takes over all functions as dealer, declaring the other players’ actions to be “Right” or “Wrong”, and the dealer merely calls out “Correct” so long as the prophet continues to accurately follow the rule of play. If the prophet makes an incorrect declaration, they are deposed as a “false prophet” and are dealt five penalty cards from the stock. They then pick up their hand, remove their marker from the mainline, and resume normal game play again. If the prophet was overthrown as a result of a player’s incorrect play, the player does not receive any penalty cards for that play (as an incentive to try to deliberately trip up the prophet).

Expelling players from the game

Beyond a certain point in the game, players who make an incorrect play (i.e. a card or string of cards declared “Wrong” or an incorrect “no play” declaration) are expelled from the game. If there is a prophet, this is when 30 or more cards have been played after the prophet’s marker on the layout. If not, then it occurs when there are 40 or more cards on the mainline. Note that it is possible for expulsion periods to stop and start again, as a new prophet essentially resets the clock for the start of the expulsion period, and overthrowing a prophet means that an expulsion period begins on the next turn if 40 or more cards have been played to the mainline.

There is one exception to expulsion, and that is when a player’s incorrect play overthrows the prophet. A player who successfully causes a prophet to be deposed is immune to both penalty cards and expulsion for their incorrect play.

When a player is expelled, they still retain their hand and receive their penalty cards, as normal. They simply do not take any part in active game play for the rest of the hand (which includes becoming the prophet).

Ending the hand

A hand of Eleusis ends when:

  • A player correctly declares “no play” while holding four or fewer cards.
  • A player depletes their hand.
  • All players (other than the prophet, if any) have been expelled.

At this point the hand is scored. Each of the players counts the number of cards in their hand, then scores the difference between the number of cards they hold and the number held by whoever had the most cards (who scores zero). For example, if a player holding thirteen cards had the most cards, then a player holding nine cards would score four points.

If there is a prophet, they score their hand as usual, but receive a bonus of one point for each correct card after their marker and two points for each incorrect card after their marker.

The dealer’s score is typically equal to whatever the highest hand score of all the players was. However, if there was a prophet, the number of cards between the starter and the prophet’s marker is counted and multiplied by two. If this value is less than the high score for the hand, this is the dealer’s score instead. (This is to provide a deterrent to making easy rules.)

Game play continues until all players have had a chance to deal. Whoever has the highest total score at this point is the winner.

Eleusis Express

Eleusis Express is a pared-down version of Eleusis that was developed by mathematics professor John Golden in 2006. It was intended as a teaching tool to illustrate the scientific method to elementary-school-aged children, although it makes for a quicker, simpler game. Eleusis Express is identical to base Eleusis except:

  • Players start with twelve cards rather than fourteen.
  • Only one card may be played at a time—no strings.
  • If a player correctly declares a no play, they are dealt a new hand with one card fewer than the number they had (if they were down to one card the hand ends). If they declared no play in error, the dealer plays a correct card from their hand to the mainline, and the player receives only two cards as a penalty.
  • There is no prophet and no expulsion.
  • If a player believes they know the rule of play, they may simply guess it out loud after any correct play. The dealer confirms if they are right or wrong (note that the exact wording on the sheet is, of course, not necessary, only an accurate and complete description of the rule). If they are right, the hand ends.

Scoring for Eleusis Express is as follows:

  • Each player scores twelve points minus one point for each of the cards in their hand.
  • A player who depleted their hand scores a three-point bonus (scoring fifteen in all).
  • A player who successfully guessed the rule scores a six-point bonus.
  • The dealer’s score is equal to whatever the highest hand score of all the players was.

See also

 

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