Isn’t that the big problem you have with calculation – trying to calculate everything in case you missed something? Imagine you could accurately calculate as many variations as you want… Ok, stop imagining that because it is just not humanly possible to calculate thousands of variations, nevermind millions. You need an effective way to cut down on the amount moves you have to calculate. There are only 3 kind of moves which you should always calculate carefully: Checks Captures Threats (a move that carries a threat – attacking your piece or threatening a tactic) Checks, captures and threats are the 3 kind of moves which is essential to calculate in every position ! And that goes not only for your moves, but also the responses of your opponent. So what to do when there are no checks, captures or threats in the position? Or what if you calculated all the checks, captures and threats and find nothing specia...