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This is an object-oriented programming implementation of Tic Tac Toe written in Ruby. The game runs in the command line, but the design is intentionally OOP: the Board is responsible for board state and win detection, Square encapsulates marker behavior, Player tracks player identity and score, and TTTGame coordinates the overall game flow (turn-taking, input, scoring, and replay). The computer opponent includes basic strategy (win if possible, block if needed, take center, otherwise choose randomly), and the match format is first to 5 wins.

Skills demonstrated:

•     Ruby
•     Object-oriented programming (classes, encapsulation, collaboration)
•     Program design (separation of responsibilities across objects)
•     State management (board state, turns, scoring, resets)
•     Control flow (game loops, turn loops, replay logic)
•     Data structures (arrays, hashes, constants for winning lines)
•     Input validation and user prompts
•     Game logic (win detection, “at risk” squares, simple AI decision-making)