password

A secret combination of characters, including letters, numbers, and/or symbols, used to authenticate a user's identity and grant access to a system, account, or resource. Passwords are typically private and should be kept secure to prevent unauthorized access.

To access her email account, Sarah entered her password, which consisted of a mix of uppercase letters, numbers, and special characters.

complexity

The state or quality of being intricate, complicated, or composed of interconnected parts, often requiring careful thought or analysis to understand or solve.

The complexity of the puzzle made it challenging to solve, as it involved numerous interconnected clues and hidden patterns.

Chess

A strategic board game played between two players, involving a square board divided into 64 squares of alternating colors. Each player controls an army of 16 pieces, including a king, queen, rooks, bishops, knights, and pawns, with the objective of checkmating the opponent's king, placing it in a position where it cannot escape capture.

Alex and Jordan spent the afternoon playing chess, carefully planning their moves to outsmart each other and achieve checkmate.