Beschreibung für das Spiel Vier Dimensionen
Dieser knifflige Rätselspaß ist dem Vorbild von Microsofts Minesweeper angelehnt. Dabei müssen versteckte Minen lokalisiert und alle anderen Felder aufgedeckt werden. Die Schwierigkeit bei dieser Version ist allerdings das Vorliegen von vier Dimensionen, die dem Spieler mehr Denken abverlangt.
Anleitung für das Spiel Vier Dimensionen
INSTRUCTIONS TO THE GAME
1. GENERAL IDEA
The game is similar to very wellknown MINESWEEPER game which installs
automatically with Windows. I suppose you already know the rules,
here are they in short: clicking on a cell "opens" this
cell and if there is a bomb there, you lose, if there is nothing
there, a number appears on the cell, showing how many boms are near
that cell. If there are no bombs nearby no number appears and additionally
the whole area of empty cells and the borders of this area are opened.
If you suppose there is a bomb on some sell you mark it with rightclick.
In this game the field is 4dimensional, and everything else is
absolutely the same. It is usually hard to understand what a"4dimensional
field" means, so go on to the next section.
2. 4DIMENSIONAL FIELD
There are lots of explanations on the web what a 4D cube is, but
since no one still knows what it is I will have to explain it, too.
Imagine a 3D cube. It has height, length and width. These are 3
dimensions. Then imagine a line of cubes. Say, we had a cube 4x4x4
and now we have 4 cubes put in a line, each 4x4x4.
If each cell of the first cube has it's "brother" in
the second, in the third and in the forth cube, we can "teleport"
from a cell in the first cube to the corresponding cell in the second
cube. Then, from that cell in the second cube, we can teleport back
to the first cube or to the corresponding cell in the third cube.
From the third cube we can teleport to the forth cube or back to
the second.
For example, if we are now in point (1;4;3) in the second cube,
we can teleport to (1;4;3) in the first cube or to (1;4;3) in the
third cube.
As you might have already understood, we move along the forth axis,
which can represent time or something else. We say, it is time.
Now look on the game screen: there is a table of squares. Each
square is a stock. A column of squares is a cube 4x4x4.
Then, four columns show the four cubes we were talking above. We
get 16 squares, representing states of 4 stocks of a cube at 4 different
points in time or in four different worlds: astral, spirit, ethereal,
material ;)
3. NEIGHBOUR CELLS IN 4D
In minesweeper for Windows each cell could have up to 8 heighbours.
Usually it had 1, 2, or 3, but in crowded areas it could have even
8. That meant all cells around the cell we clicked on are bombs.
You would be surprised to know that in 4D there can be as much
as 80 neighbours for one single cell.
In 2D the number of neighbours is (3*3)  1 = 8; (The square 3x3
without the center cell)
In 4D the number of neighbours is (3*3*3*3)  1 = 81  1 = 80;
(The hypercube 3x3x3x3 without the center cell).
So, do not be confused if you see a number like 12 on some cell.
The place is not at all overpopulated.
To make life easier neighbour cells of the cell you have your cursor
over are highlighted. After you move the cursor around a bit, you
will at some point understand what the **** it is: so much neighbours,
it is impossible, the game is not for a human! The nighbours are
not only in this square, but they are also in all 8 squares around..
Actually it not so hard, at least when on a large 4x4x4x4 field
there are only 3 bombs  this is the easiest level of difficulty,
needed just for general understanding of the game. Try to beat it,
and you get the idea.
4. HOW TO PLAY (A GOOD STRATEGY I KNOW)
In minesweeper for windows we clicked on the cells like robots:
no one needed to think, because nearly in all cases it was obvious
where to click next.
In this game you must have high IQ :) and good logic just to make
a few secure clicks. On the medium difficulty level it usually takes
about a minute to make a few successful clicks.
Strategy:
 click somewhere close to the side or to the edge to open a large
empty area. Without it nothing works.
 search for "edge bombs". That means there is a cell
with "1", and when you move your cursor over it, you see
that there is only one unopened highlighted cell near it. Highlighted
cells have red frames, and if the cell is unopened and highlighted,
its field is yellow. So, "edge bomb" must be on that yellow
cell, if you moved the cursor over "1" and saw a single
place where a bomb can be. Mark it (rightclick).
 If you marked some cell as a bomb, you get an advantage: now
you can securely open all cells, which obviously are neighbours
of this only bomb and not other bombs. The process may be familiar
to you from windows minesweeper.
 If there are no edgebombs, you will have to use another trick:
find some cell with a number and some unopened neighbours. For example,
you move the cursor over a cell with "1" on it, and there
are 2 unopened neighbours near it. That means the bomb is in one
of these cells. Then, say, you move the cursor to a neighour cell
with "2" and see, that this cell has the same unopened
neighbours, as the cell with "1" and one more unopened
neighbour. Analyse the situation: cell with "1" has two
candidates for a bomb, cell with "2" has the same two
cnadidated and one more candidate. If the first two candidates contain
one bomb it is logical for the third candidate to have a bomb, otherwise
the cell with "2" would have "1". So, you can
mark the third candidate as a bomb.
This last trick will give you the ability to beat a 10bombs field.
To feel comfortable with it you need some practice, of course.
Still, a 20bombs field (hardest difficulty level) is not so easy
to beat even if you master all the tricks described above. I have
never beat it yet, beacause at some point of the game I usually
noticed that my brain was aching, and my calculation abilities were
not enough to remember how many bombs must be on different groups
of cells.
5. FINAL REMARKS
Although gameplay of this applet is bad and the difficulty is too
high, few people will play it. It may be interesting for mathematicians
and maybe some puzzlefans.
It is possible to make a 5D and 6D Minesweeper, even a 10D minesweeper.
And, say, if we have a 4x4x4x4x4x4x4x4x4x4 filed there can be up
to 3^101= 59048 neighbours. And it can be still shown on a very
large 2D screen if we build table (10D) of tables(8D) of tables(6D)
of tables(4D) of squares(2D) of cells.
Autor: Igor Galochkin (iseeall@narod.ru)
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