2500 kcals/day would be around 121 watts, yeah. But computers have much lower idle consumption than humans. So if we assume alphago idles at ~45w that would co

2500 kcals/day would be around 121 watts, yeah. But computers have much lower idle consumption than humans. So if we assume alphago idles at ~45w that would consume around 1000 kcal for 21 hours leaving 1500 kcal for the 3 hours it was given to think which would be more like 580 watts. That sounds pretty doable.