Because GPT doesn't "know" what you're asking it to do. If you want it to be able to call out to a chess engine when you ask it "Solve this chess problem" then

Because GPT doesn't "know" what you're asking it to do. If you want it to be able to call out to a chess engine when you ask it "Solve this chess problem" then we're back in the old world of grammars and trying to parse sentence structure.