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- Rules for Dozen
-
- Object
- Attempt to get all 25 numbers in the 5x5
- grid equal to 12.
-
- Method
- You are able to change all the number in
- a column (labeled A,B,C,D,E) or row
- (labeled F,G,H,I,J) by using the simple
- math functions of addition, subtraction,
- multiplication or division.
-
- Some simple rules must be observed.
- 1) No result of a math operation may
- total greater than 99 or less than
- 1.
-
- 2) No division may produce a fractional
- result.
-
- You are prompted to make your selections
- You do not have to use capital letters.
- Lower case will do. Also, no <enter>
- are needed. Just type you choice and
- the program will prompt your next entry.
-
- If you make a mistake the computer will
- prevent you from completing an
- operation. It will indicate what mistake
- you made and start your move again.
-
- How You Make Selections
- First you are requested to select a row
- or column (A-J). Any other choice will
- be rejected.
-
- Then you select an operation. A=add,
- S=subtract, M=multiply and D=divide
-
- Then select the number you will add,
- subtract, multiply or divide by.
-
- Example
- Let us say that the board looks like
- this: A B C D E
- F 6 12 56 88 96
- G 22 44 9 91 18
- H 3 34 18 90 45
- I 61 70 93 38 77
- J 88 14 33 72 62
-
- You decide to change row "F"
- So you Imput "f". Then you decide
- you will add 2. So push "a" and then
- then number "2".
-
- The computer will change Row F to:
-
- F 8 14 58 90 98
- Note that you cannot add 2 again since
- the 98 would be grater than 99. Also
- you coulld not subtract 9 since the 8
- would become -1.
-
- No multiplication is possible since
- any result greater than 99 is not
- allowed. You could divide by 2 but not
- 3 since no fractions can result.
-
- There are more starting combinations
- than Rubic's Cube (25^100). But if
- you're good you can solve the puzzles
- consistently in under 60 moves!
-
- Good luck. Any comments or questions
- to: CIS 72325,614 - George
- ---------------------------------------
-
- 12.com User Interface
-
- The four arithmetic operations are on
- the keys:-
-
- = add (+ with no shift)
- - subtract
- . multiply
- / divide
-
- No operation is done until a digit key
- is pressed. So to add 12 to column A
- you only need to press 4 keys:-
- A = 6 6
-
- You can take back a move by pressing
- the backspace key.
-
- You can give up by pressing 'q'. Then
- a menu offers:-
-
- C(ont, H(ist, R(eplay, Q(uit:
-
- Continue resets the board for another
- game.
- History plays through the previous
- game. After each move <cr> makes the
- next move or 'q' gives the menu again.
- Replay restores the board so you can
- try and solve the position again.
- Quit quits.
-
- Hugh Satow, March 1992
- hugh@bilpin.co.uk
-