README.md

1812. Determine Color of a Chessboard Square

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'

Solutions (Python)

1. Solution

class Solution:
    def squareIsWhite(self, coordinates: str) -> bool:
        return ord(coordinates[0]) % 2 != ord(coordinates[1]) % 2

Solutions (Ruby)

1. Solution

# @param {String} coordinates
# @return {Boolean}
def square_is_white(coordinates)
  coordinates[0].ord % 2 != coordinates[1].ord % 2
end