https://lichess.org/@/Fingolfin7/blogFingolfin7's Blog2026-03-02T00:54:20.782Zhttps://lichess.org/@/Fingolfin7/blog/a-harness-for-llm-chess-board-state-and-context-handling/WvlUxmno2026-03-02T00:54:20.782Z2026-03-02T00:54:20.782ZA Harness for LLM Chess: Board State and Context Handling<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&amp;h=550&amp;op=thumbnail&amp;path=vRe9RbmCTPGz.webp&amp;w=880&amp;sig=ac3af07e59d451c392159f59876429abf3fa21fd" /><br />LLMs are terrible at chess — but mostly because we’re prompting them badly. I built a system that gives them memory, structure, and legal move enforcement. Then I made them play each other.Fingolfin7