Chessboard:

The chessboard is an 8 x 8 grid with 64 cells in it. With 8 rows (A, B, C…. H) and 8 columns (1, 2, 3…. 8), each cell can be uniquely identified with its cell number. This can be seen illustrated below.

Chess pieces and their movements:

The game of chess has 6 unique types of pieces, with their own unique types of movements. These are:

1.) King – Can move only 1 step at a time in all 8 directions (horizontal, vertical and diagonal)

2.) Queen – Can move across the board in all 8 directions

3.) Bishop – Can move across the board only diagonally

4.) Horse – Can move across the board only in 2.5 steps (2 vertical steps and 1 horizontal step)

5.) Rook – Can move across the board only vertically and horizontally

6.) Pawn – Can move only 1 step at a time, in the forward direction, vertically. Can also move 1 step forward diagonally, in order to eliminate an opposing

Possible Inputs and Outputs:

**Input** – The input string to your program will be the **Type** of chess piece and its **Position** (cell number) on the chessboard. E.g. **“King D5”**
**Output** – Once you execute the program, the output will be a string of **all possible cells in which the chess piece can move.**

Assumption: Assume that the board is empty. This means that the pawn cannot move diagonally.

Dependency:

1. This application is built on Node.JS (express.js framework) as well as we used some additional packages for security purpose and unit testing purpose.

   i. express - Node.JS Framework

   ii. express-validator - Request validator

   iii. helmet - Helmet helps you secure your Express apps by setting various HTTP headers.

   iv. underscore - Underscore.js is a utility-belt library for JavaScript

   v. chai - devDependency - Chai.js is a javascript test framework

   vi. chai-http - devDependency - chai-http is used for create http request for unit test

   vi. chai-http - devDependency - chai-http is used for create http request for unit test

   vii. express-swagger-generator - devDependency - It is used for generating a API documentation

   viii. mochawesome - devDependency - Mochawesome is a custom reporter for use with the Javascript testing framework.

   ix. standard - devDependency - Standard is a JavaScript style guide.

Usage:

1. To get the chess pieces movement follow the below steps.

   i. Install the dependencies using npm install command

   ii. Run the Server using 'npm start' command. It will listen on http://localhost:8080

   ii. Hit HTTP Request to URL http://localhost:8080/api/v1/chessBoard/ with POST method with given input parameters

   iii. select 'Pawn' from given array. E.g. ['King', 'Queen', 'Bishop', 'Horse', 'Rook', 'Pawn']

   iv. select position of row from given array. E.g [a,b,c,d,e,f,g]

   v. select position of column from given array. E.g [1,2,3,4,5,6,7,8]

In this way you can get the possible moves of each pieces.

Thanks.

Ketav Chotaliya