Application of connect-4 game, Computer Engineering

Assignment Help:

The game Connect-4 is played on a board that has seven columns. There are six spaces on each column. The board is initially empty. Two players take turns dropping one piece (black or grey in the diagram below, but "X" or O" in our game) in a column. The piece falls into the lowest unoccupied row. A player cannot move in a column if the top-most row of that column already has a piece in it. The first player to get four of their counters in a line (horizontally, vertically, or diagonally) is the winner. 

You have been provided with two files for this problem: minimax.lisp, which contains lisp code for the minimax algorithm, and  connect-4.lisp, which contains a working Lisp implementation of the Connect-4 game. 

As the Connect-4 implementation currently stands, you should  have absolutely no problem beating the program. Try it:  

[1]> (load 'minimax)

;; Loading file C:\CSE2AIF\minimax.lisp ...

;; Loaded file C:\CSE2AIF\minimax.lisp

T

[3]> (load connect-4)

;; Loading file C:\CSE2AIF\connect-4.lisp ...

;; Loaded file C:\CSE2AIF\connect-4.lisp

T

[3]> (play)  

The program plays poorly because it has a poor-quality heuristic. The function static, which evaluates a position from the point of view of a particular player, is currently defined as follows: (defun static (board player) 0)

This means that each board configuration receives exactly the same evaluation; i.e., 0.  Your task for this question is to develop and implement a good heuristic for the Connect-4 game.  The only LISP code that you are required to write is a LISP function static, which accepts a board and player as input arguments, and returns an evaluation of the board state from the point of view of player. You can, of course, write as many helper functions as you like.  

To assist you, the code you have been supplied with contains a parameter *all-c4-lines* which is a list of all of the 69 possible ways to win in Connect-4. Each element of this list is a list of length four, such as

 ((3 5) (4 5) (5 5) (6 5))

Each element of this is the column and row. For example, the above list indicates that there is a line of length four that includes a piece at the 4th column of the 6th row, the 5th  column of the 6th row, the 6th column of the 6th row, and the 7th column of the 6th row.

 Note that rows and column indexing starts at 0.

The Lisp built-in function  aref can be used to find what piece, if any, is at a specified location. For example, to find what piece, if any, occupies column col and row row of the current board state, evaluate the following code 

   (aref board col row)

This will return either nil, x or o.


Related Discussions:- Application of connect-4 game

What do you mean by data distribution, Q. What do you mean by Data Distribu...

Q. What do you mean by Data Distribution? Data distribution directives tell compiler how program data is to be distributed among memory areas connected with a group of processo

Processors hypercube and utilisation displays, Processors Hypercube Thi...

Processors Hypercube This is specific to in the hypercube: Here, every processor is depicted by the set of nodes of the graph and the several arcs are represented with communic

Identify the main enhancements brought along by tkip, Question: (a) Id...

Question: (a) Identify the four main enhancements brought along by TKIP on WPA to solve the problems in WEP. (b) The term WarDriving has been frequently used while talking

Layers of distributed system architecture, Q. Layers of Distributed System ...

Q. Layers of Distributed System architecture? Layers of Distributed System architecture are: Presentation Layer is actual user interface. This layer receives input and

Define class p, Define class P  The class of all sets L that can be kno...

Define class P  The class of all sets L that can be known in polynomial time by deterministic TM. The class of all decision problems that can be decided in polynomial time.

Estate agency application, Build U Like are a building company specialising...

Build U Like are a building company specialising in hard landscaping. They lay patios, build walls, lay drives etc. for their customers. A customer will remain in the system even t

Multiple instances of sql server 2000, How do I connect to an SQL Server in...

How do I connect to an SQL Server instance that is running on a machine with multiple instances of SQL Server 2000? Ans) Every instance of MS SQL Server must be listening on a d

.master-slave flip flop, JK, SR, D master FF 1)draw block diagram 2) combin...

JK, SR, D master FF 1)draw block diagram 2) combinational circuits using NOR & NAND gate thank you

Plot2fnhand, Write a function "plot2fnhand" that will receive 2 function ha...

Write a function "plot2fnhand" that will receive 2 function handles as input arguments, and will show in two Figure Windows plots of these functions, with the function names in the

Pushbutton switches, Use the input capture to control the digital clock.  I...

Use the input capture to control the digital clock.  In this part, there will be two switches to control the clock, one is for starting the clock and one is for stopping the clock.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd