# Model a Turn-Based Cats and Rabbits Board Game Design the object model and move-validation flow for a two-player game on a `7 x 7` board. Each player starts with two cats, two rabbits, and one snail. Cats move up to three squares horizontally or vertically; rabbits move up to two diagonally; snails move one square in any direction and cannot capture. Friendly pieces block movement. Cats and rabbits may capture enemy pieces they traverse, and movement ends at the first capture. A turn may not end with the player's snail capturable; if no legal move removes that danger, the player loses. ### Constraints & Assumptions - Move rules must be extensible without duplicating board logic. - A proposed move is validated before mutating game state. ### Clarifying Questions to Ask - Can a cat or rabbit stop before its maximum distance without capturing? - Is danger evaluated against every legal opponent move on the resulting board? ### What a Strong Answer Covers - Piece-specific movement, occupancy, capture, and turn state. - Transactional simulation for snail-safety validation. - Legal-move generation and the no-escape loss condition. ### Follow-up Questions - How would you add undo and replay? - Which tests expose captures, blockers, and danger-check bugs?