Monday, August 13, 2007








Martian
Greenhouse


a solitaire Icehouse game

by Becca Stallings


















Number of Players



One.



Number of Stashes



Any even number, preferably four or six. Opaque colors make a more
challenging game.



Premise



You are a botanist hired to genetically engineer Martian flowers for
colonists to plant in their gardens. Your employer gives productivity
bonuses, so you want to produce each flower with the fewest possible
generations of breeding.



The genetic structure of the Martian flower consists of six pyramidal
chromosomes arranged in a linear configuration or «stack». When flowers
breed, they produce two offspring, with three chromosomes from each
parent going into each child. The three chromosomes from one parent
always remain in the same order relative to one another.



Setup



Before beginning the game, write a list of the flowers ordered by your
employer and set it aside for reference. (The longer the list, the
longer your game. Make sure your list does not require more than five of
any one kind of pyramid.)



Next, collect some breeding stock from the wild and set up your
greenhouse: Put all the pyramids into a bag, draw them out without
looking, and form stacks of six. Line them up on the table, leaving some
laboratory space between you and the greenhouse.



Playing




  1. Select two flowers to breed. Take them from the greenhouse into the
    lab.


  2. Unstack each flower, being careful to keep the chromosomes in order,
    so that you have two parallel rows of six.


  3. Decide which three chromosomes from one parent will combine with which
    three from the other parent, and slide those pyramids into the area
    between the rows, keeping them in order.


  4. Next, decide how the three from one parent will mesh with the three
    from the other.



    • Chromosomes from the same parent have to stay in order
      relative to each other, but they can intersperse in any way with
      those from the other parent. That is, if one parent
      contributes one of each size red (1R, 2R, 3R) and the other parent
      contributes one of each size blue (1B, 2B, 3B), the offspring's
      genetic structure might be:



      • 1R, 2R, 3R, 1B, 2B, 3B


      • 1R, 1B, 2R, 3R, 2B, 3B


      • 1B, 1R, 2B, 2R, 3B, 3R


      • 1B, 2B, 1R, 2R, 3R, 3B; etc.




  5. Stack the chromosomes to produce one offspring.


  6. Then stack the remaining six chromosomes, using the same rules, to
    produce another offspring.



When breeding is complete, you may choose to place both new flowers in
the greenhouse and select two different ones to breed, or you may keep
one new flower and breed it with any flower from the greenhouse. You
may not breed the two new flowers with each other, as such incest
will cause deadly mutations.



Continue breeding until you have produced all the flowers on your list.



Example of Play



Suppose one of the flowers on your list is pure purple, with two smalls
on top of two mediums on top of two larges.


1P, 1P, 2P, 2P, 3P, 3P


From the greenhouse, you choose a pair of flowers which together happen
to contain one of each size of purple,


Flower 1: 2B, 3R, 1B, 1B, 2P, 3R
Flower 2: 2C, 1P, 1C, 1R, 2B, 3P


and select the purple chromosomes plus enough extras to make a flower,


From No. 1: 1B, 2P, 3R
From No. 2: 1P, 2B, 3P


and stack them together into a half-purple offspring.


1P, 1B, 2P, 2B, 3P, 3R


The remaining chromosomes are


From No. 1: 2B, 3R, 1B
From No. 2: 2C, 1C, 1R


and you stack them to make the other offspring.


2B, 2C, 1C, 1R, 3R, 1B


For your next turn, you put the non-purple offspring back into the
greenhouse and breed the half-purple offspring with another flower from
the greenhouse, which happens to contain at least one of each size
purple,


1P, 1B, 2P, 2B, 3P, 3R (your offspring)
3P, 1P, 2P, 2P, 3R, 3P (greenhouse flower)


and you set aside one of each size in the needed order from each parent,


From your offspring: 1P, 2P, 3P
From the other one: 1P, 2P, 3P


which you then combine to fill the order.


1P, 1P, 2P, 2P, 3P, 3P (congratulations!)


If more flowers remain, play would continue by combining the remaining
six chromosomes from your success into a new flower, and then either
pairing it with something in the greenhouse or bringing out two
greenhouse flowers.



Comments by the Editor



Becca posted this to the Icehouse mailing list in June of 2002, and it
disappeared from sight shortly thereafter. I stumbled across the old
email a few months later, and thought it worth preserving on the Web.
Becca gave permission, so here it is.



Like most solitaires, it's more of a puzzle rather than a game. But a
nice feature is that the same order list can be played several times,
since the starting group of flowers is randomized. This ranks up with
solitaire Volcano (and practicing Thin Ice or CrackeD Ice) as the best
one-player Icehouse diversions.



This plays well using three to five orders with four stashes, or five to
seven orders with six stashes. And yes, using black or white (or both)
greatly increases the challenge.




Geotarget

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