The prompt asks for a single, ready-to-run interactive chess app delivering full rules enforcement (castling, en passant, promotions, check/checkmate), an AI opponent with three difficulty settings, an algebraic-notation move history panel, and a polished modern board with smooth piece animations — all completed in one submission with no follow-ups.
Request to deliver a single interactive artifact: a fully playable chess app that must work in one shot with no follow-ups.
Full Prompt:
Build a fully playable chess app as a single interactive artifact. Requirements: complete legal move validation (including castling, en passant, pawn promotion, check and checkmate detection), an AI opponent with 3 selectable difficulty levels, a move history panel in algebraic notation, and a clean modern board design with smooth piece animations. Everything must work in one shot with no follow-ups.