TI-BASIC:Mancala

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Mancala is an ancient game in which player take turns dropping stones (or seeds) into holes (or houses) that form a 6x2 grid with an extra house on either end, which are the players' end houses. Player choose a house on their side of the grid, pick up the stones in that house and distribute them in the consecutive houses going in a counter-clockwise manner. There are many rule sets to mancala, just as there were many civilisations that played versions of it. This page gives two versions: The "kahla" rule set widely used in the United States and coded by user kg583, and another rule set coded by TI-GBR (rules are explained).

Version 1: Kahla

-- Programmed by kg583 and optimised by the TI-Basic Developer community (see credits for details) -- Compatible on both grayscale and color calculators

Version 1 rules:

See wikipedia page describing "kahla" rules of play ----- "KAHLA" mancala

The Code, Version 1, Kahla Mancala
ClrHome
14-->F
F-->dim(L1
Fill(3,L1                         
0-->Xmin
1-->deltaX                        //The little triangle X
{5,6-->L2
If Xmax=94
L2-{1,5-->L2
L2(1-->C 
L2(2-->D
DelVar J1-->P
Lbl M
For(X,1,6
Output(C-1,D+2X+(X>3),L1(X
Output(C+2,D+2X+(X>3),L1(F-X
End
L1(7-->H                         //Saves a couple of bytes to do this
L1(F-->I
Output(C,D+(I>=9),"_ _ _          
Output(C+1,D+F,"_ _ _
Output(C,D+(I>=9),I          //Greater than or equal to 9
Output(C+1,D+F,H       
If J 
Then
Pause
ClrHome
If H>I
Disp "Player 1 Wins!
If HA
C-1+3(P=2-->B
Repeat K=21
getKey-->K
Output(B,A-1,">
Output(B,A+1,"<
If K
Then
Output(B,A-1,"_              //One space here and the next line
Output(B,A+1,"_
End
A+(K=26)(A=D+6)+2(K=26)(A=!D+13)-(K=24)(A=D+9)-2(K=24)(A=!D+2-->A           //The symbol =! means "doesn't equal"
If K=45
Goto Q
End
.5(A-D-(A>D+6-->X
F(P=2)-X+2X(P=1-->X
L1(X-->V
0-->L1(X
If not(V
Goto M
While V
X+1-->X
If X=15
1-->X
1+L1(X-->L1(X
V-1-->V
End
If X/7!=P
Then
If 1=L1(X
Then
1+L1(7P)+L1(F-X-->L1(7P
0-->L1(X
0-->L1(F-X
End
3-P-->P
End
If not(sum(L1,1,6             //Tried to a piecewise thing here; had to settle for two If's
Then
L1(F)+sum(L1,8,13-->S
L1(7-->T
Fill(0,L1
S-->L1(F
T-->L1(7
1-->J
End
If not(sum(L1,8,13
Then
L1(7)+sum(L1,1,6-->S
L1(F-->T
Fill(0,L1
S-->L1(7
T-->L1(F
1-->J
End
Goto M
Lbl Q
ClrList L1,L2
ZStandard
ClrHome

Version 2:

-- Programmed by TI-GBR and optimised by the TI-Basic Developer community (see credits for details)

Version 2 rules:

board 6 by 2 active houses with 4 stones starting in each, and two wells, one at either end.

Picture at start [1]

(Its been stretched a little)

Each player, on their turn, chooses a house on their side of the board. (6 options) the stones from that house get distributed by picking them up, and placing 1 stone in each house consecutive to the last, going around in a counter-clockwise pattern until the stones run out. If the last stone falls in one of the wells, then the player gets another turn. The first player to clear their side of the board of stones wins.

After first turn: player 1 has chosen the fourth house from the top, the last stone fell in a well, so player 1 will go again. [2]

Player 1 goes again. [3]

Now its player 2's turn.


End of game image:

[4]

Player 2 has won.


The Code, Version 2
:Clrhome                                                        //setup
:14->dim(L1
:Fill(4,L1                                              
:0->L1(7
:0->L1(14                                                       //L1 setup finished here; board ready
:DelVar WDelVar K1->L
:"PLAYER_
:For(P,1,8
:Output(P,1,sub(Ans+"2",P,1
:Output(P,16,sub(Ans+"1",P,1
:End
:Repeat W                                                    // Main loop, Keep playing until W is no longer = 0, (equals 1 or 2)
:If L!=7 and L!=14                                          //Does not switch player if L = 7 or 14, allows for extra turns
:1+(P=1->P                                          //switch player between 1 and 2
:1->L                                                             //Initialize L
:For(A,1,6                                                     // Display the board after clearing possible extra numbers. See L1 schematic below.
:Output(A+1,6,"_
:Output(A+1,5,L1(A
:Output(A+1,12,"_
:Output(A+1,11,L1(14-A
:End
:Output(8,8,L1(7
:Output(1,8,L1(14
:1->R                                                                 //initialize R which is the row input number
:Repeat K=105 and L1(R(P=2)+(14-R)(P=1))!=0                                                 //repeat input routine until user presses enter and the current house is not empty
:Output(R+1,4(P=2)+13(P=1),sub("<>",P,1             //Display the appropriate cursor at the relative R coordinate and at  the x value of 4 if P=2 and at 13 if P=1
:Repeat Ans                                                           // getkey
:getkey->K
:End
:Output(R+1,4(P=2)+13(P=1),"_                             //Delete the cursor
:min(6,max(1,R+(K=34)-(K=25->R                  //Depending on input, add or subtract 1 from R, within the bounds
:End                                                                // End input routine
:R(P=2)+(14-R)(P=1)->L                                    //Calculate L Based on R and the player number (right now, L is the list element number that was chosen)
:L1(L->S                                                            //Set S to the number of stones in the chosen lest element
:0->L1(L                                                            //Remove the stones from the chosen list element
:While S                                                    //Distribution loop ends when S = 0
:L+(L<14)-13(L=14->L                                        //Select the next list element. If The current List element is 14, the next is 1 (loops around)
:1+L1(L->L1(L                                               //These two commands add one to the list element house (determined by L), and take one away from the supply (S)
:S-1->S                                                          
:End                                                                 //End Distribution loop, check S
:seq(L1(M),M,1,6                                              // take Player 2's Houses list from L1
:If not(max(Ans                                                 // If none of player 2's Houses have stones-
:2->W                                                                //then store 2 to W, Game will end.
:seq(L1(M),M,8,13                                             //take Player 1's Houses from L1
:If not(max(Ans                                               //If none of player 1's Houses have stones-
:1->W                                                             //then store 1 to W, Game will end.
:End                                                               // End main loop, check W
:Clrhome                                                            // clear screen
:SetupEditor               
:"CONGRATS_PLAYER"+sub("12",W,1        //display winner


Vars used: 

   L1 - list of number of stones in each house
   R - Input row number from which L is derived (can be equal to any #1-6)
   P - Player 1 or 2
   L - Chosen List element (house) to empty - equals: R if P+2 and equals: 14-R if P=1
   W - Win or continue playing and for which player if win. Can equal 0,1, or 2, if 1 or 2, game ends
   S - number of stones left to distribute during distribution routine.
   A - a counting var used in For( loops.

Credits

The original version 1 was coded by kg583 It was then optimised by the TI-Basic community, Including:

  • kg583
  • earthnite
  • TI-GBR
  • lirtosiast

The original version 2 was coded by TI-GBR It was then optimised by the TI-Basic community, Including:

  • TI-GBR
  • earthnite
  • kg583
  • jonbush

This was a COMMUNITY PROJECT and was developed in the Projects page

See development page

THANK YOU to everyone who participated in this community project!

If anyone experiences problems with the code on this page, please post on the "Discuss" page for this page. See the tools below.

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