Board and piece hierarchy in LLD - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare the base class for all pieces.

LLD

class [1]:
    def __init__(self, color):
        self.color = color

Drag options to blanks, or click blank then click option'

ACell

BBoard

CPiece

DGame

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Board' instead of 'Piece' as the base class name.

The base class for all pieces should be named Piece to represent any game piece.

2fill in blank

medium

Complete the code to define the board class with a grid attribute.

LLD

class [1]:
    def __init__(self, rows, cols):
        self.grid = [[None for _ in range(cols)] for _ in range(rows)]

Drag options to blanks, or click blank then click option'

ABoard

BPiece

CCell

DGame

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing 'Piece' with 'Board' when naming the class.

The class representing the game board should be named Board and contain a grid attribute.

3fill in blank

hard

Fix the error in the piece subclass definition for a chess knight.

LLD

class Knight([1]):
    def __init__(self, color):
        super().__init__(color)

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ACell

BPiece

CBoard

DGame

Attempts:

3 left

💡 Hint

Common Mistakes

Inheriting from Board or Game instead of Piece.

The Knight class should inherit from the base Piece class.

4fill in blank

hard

Fill both blanks to complete the method that moves a piece on the board.

LLD

def move_piece(self, from_pos, to_pos):
    piece = self.grid[1]from_pos[0]][from_pos[1]]
    self.grid[2]to_pos[0]][to_pos[1]] = piece

Drag options to blanks, or click blank then click option'

A[

B(

C]

D)

Attempts:

3 left

💡 Hint

Common Mistakes

Using parentheses instead of square brackets for list indexing.

To access and assign elements in a 2D list, square brackets [ ] are used.

5fill in blank

hard

Fill all three blanks to complete the dictionary comprehension that maps piece names to their counts.

LLD

piece_counts = [1]: [2] for [3] in pieces}

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Apiece.name

Bpieces.count(piece)

Cpiece

Dpiece.color

Attempts:

3 left

💡 Hint

Common Mistakes

Using piece.color as key instead of piece.name.

Using the wrong variable in the loop.

The dictionary comprehension maps each piece's name to how many times it appears in the list.