AttoChess: A 278-byte DOS chess engine
Summary
The article documents AttoChess, a 278-byte DOS .COM chess engine that performs a complete play loop, including rendering, input, and a four-ply minimax search. It details the size-optimization techniques, lineage from LeanChess, verification steps, and practical build/run instructions. The piece also notes the engine's scope, limitations, licensing, and the historical context of record-setting tiny chess programs.