Honestly, if you strip away the myths, the big difference is that generals had to read a battlefield full of noise—terrain, morale, supply lines—whereas a grandmaster has a neat board and fixed pieces. Chess forces you to plan three moves ahead in a controlled environment, but a general has to juggle supply, weather, and the unpredictability of enemy commanders. So while the chess mindset of calculated risk is useful, ancient generals had to improvise on the fly. It’s like comparing a rehearsal to a live performance, and that’s where the real skill shines.