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1812. Determine Color of a Chessboard Square

Difficulty Topics

Description

You are given coordinates, a string that represents the coordinates of a square of the chessboard. Below is a chessboard for your reference.

Return true if the square is white, and false if the square is black.

The coordinate will always represent a valid chessboard square. The coordinate will always have the letter first, and the number second.

 

Example 1:

Input: coordinates = "a1"
Output: false
Explanation: From the chessboard above, the square with coordinates "a1" is black, so return false.

Example 2:

Input: coordinates = "h3"
Output: true
Explanation: From the chessboard above, the square with coordinates "h3" is white, so return true.

Example 3:

Input: coordinates = "c7"
Output: false

 

Constraints:

  • coordinates.length == 2
  • 'a' <= coordinates[0] <= 'h'
  • '1' <= coordinates[1] <= '8'

Solution

determine-color-of-a-chessboard-square.py
class Solution:
    def squareIsWhite(self, coordinates: str) -> bool:
        a, b = ord(coordinates[0]) - ord('a'), int(coordinates[1])

        return (a % 2 == 0 and b % 2 == 0) or (a & 1 and b & 1)